🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 5 (from laksa135)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa005.int.ahrefs:8124/' \
  -H 'Content-Type: text/plain' \
  -H 'X-ClickHouse-Database: crawler3' \
  -H 'Authorization: Basic YXBpOg==' \
  -d 'SELECT getAhrefsURLFromUnparsed(src_unparsed) AS found_url, ifNull(toUnixTimestamp(download_stamp), 0) AS crawl_time, ifNull(toUnixTimestamp(props_url_first_seen), 0) AS first_indexed_time, download_http_code AS http_code, src_unparsed AS src_unparsed, src_root_hash AS src_root_hash, history_drop_reason AS history_drop_reason, meta_title AS meta_title, meta_descriptions AS meta_descriptions, attrs_boilerpipe_text AS attrs_boilerpipe_text, attrs_markdown AS attrs_markdown, attrs_readable_markdown AS attrs_readable_markdown, meta_canonical AS meta_canonical FROM crawler3.page_info_local FINAL PREWHERE (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://www.cdc.gov/me-cfs/signs-symptoms/index.html\')), getAhrefsUnparsedNoserviceFromURL(\'https://www.cdc.gov/me-cfs/signs-symptoms/index.html\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/www.cdc.gov\/me-cfs\/signs-symptoms\/index.html","crawl_time":1772477395,"first_indexed_time":1716219501,"http_code":200,"src_unparsed":"gov,cdc!www,\/me-cfs\/signs-symptoms\/index.html s443","src_root_hash":"17308952984333333205","history_drop_reason":null,"meta_title":"Symptoms of Myalgic Encephalomyelitis\/Chronic Fatigue Syndrome | ME\/CFS | CDC","meta_descriptions":["ME\/CFS has 5 core symptoms. Diagnosis requires 3 main symptoms and at least 1 other symptom"],"attrs_boilerpipe_text":"Myalgic encephalomyelitis\/chronic fatigue syndrome symptoms are common in many other illnesses.\nThere is no test to confirm ME\/CFS. This makes it hard to diagnose.\nSymptoms are unpredictable and may change or come and go over time.\nHowever, a combination of core symptoms are used to diagnose ME\/CFS.\nPrimary symptoms\nME\/CFS has five core symptoms. You must have three main ME\/CFS symptoms and at least one of the other two symptoms to be diagnosed with ME\/CFS.\nLess ability to do activities and fatigue (required)\nPeople with ME\/CFS have a much lower ability to do activities they could do before they got sick. This limitation comes with fatigue and lasts six months or longer.\nThe fatigue:\nCan be severe\nIsn't caused by an unusually difficult activity\nIsn't relieved by sleep or rest\nWorse symptoms after activity (required)\nPeople with ME\/CFS experience a worsening of their symptoms after any type of activity - physical or mental. These activities wouldn't have been a problem before they became ill. This is called Post-Exertional Malaise (PEM).\nPEM can lead to a cycle of \"pushing\" to do more, followed by \"crashing.\" During a crash, people with ME\/CFS may have a variety of symptoms. These can include difficulty thinking, problems sleeping, sore throat, headaches, feeling dizzy, or severe tiredness.\nIt may take days, weeks, or longer to recover from a crash. Some people may be confined to bed or the house. As examples:\nAttending a school event may leave someone house-bound for days.\nGrocery shopping may require a nap in the car before driving home.\nDoing errands may require getting a ride home.\nShowering may leave someone bed-bound for days.\nWorking may mean spending nights and weekends recovering.\nSleep Problems (Required)\nPeople with ME\/CFS may not feel better or less tired, even after a full night's sleep. Some may have problems falling asleep or staying asleep.\nAdditional symptoms (At least 1 required)\nIn addition to the three required symptoms above, one of the following two symptoms is needed to be diagnosed with ME\/CFS.\nMemory and thinking problems\nMost people with ME\/CFS have trouble thinking quickly, remembering things, and paying attention to details. People with ME\/CFS often say they have “brain fog” to describe this problem. This is because they feel “stuck in a fog” and not able to think clearly.\nProblems being upright\nPeople with ME\/CFS often report their symptoms get worse when they are standing or sitting upright. This is called orthostatic intolerance.\nPeople with ME\/CFS may be lightheaded, dizzy, weak, or faint while standing or sitting up. They may have vision changes like blurring or seeing spots.\nOther common symptoms\nMany but not all people with ME\/CFS have other symptoms.\nPain\nis very common in people with ME\/CFS. The type of pain, where it occurs, and how bad it is varies a lot. The pain people with ME\/CFS feel is not caused by an injury. The most common types of pain in ME\/CFS are:\nMuscle pain and aches\nJoint pain without swelling or redness\nHeadaches, either new or worsening\nSome people with ME\/CFS may also have:\nTender lymph nodes in the neck or armpits\nFrequent sore throat\nDigestive issues, like irritable bowel syndrome\nChills and night sweats\nAllergies or sensitivities to foods, odors, chemicals, light and noise\nMuscle weakness\nShortness of breath\nIrregular heartbeat\nMay 10, 2024\nSources\nDisclaimer: This website is for informational purposes only. The information provided on this website is not intended to be a substitute for professional medical advice, diagnosis, or treatment.","attrs_markdown":"[Skip directly to site content](https:\/\/www.cdc.gov\/me-cfs\/signs-symptoms\/index.html#content) [Skip directly to search](https:\/\/www.cdc.gov\/me-cfs\/signs-symptoms\/index.html#cdc-search) [Skip directly to On This Page](https:\/\/www.cdc.gov\/me-cfs\/signs-symptoms\/index.html#first-on-this-page)\n\n![](https:\/\/www.cdc.gov\/TemplatePackage\/5.0\/img\/uswds\/us_flag_small.png) An official website of the United States government\n\n[Here's how you know](https:\/\/www.cdc.gov\/me-cfs\/signs-symptoms\/index.html#gov-notice)\n\n![](https:\/\/www.cdc.gov\/TemplatePackage\/5.0\/img\/uswds\/icon-dot-gov.svg)\n\n**Official websites use .gov**\n\nA **.gov** website belongs to an official government organization in the United States.\n\n![](https:\/\/www.cdc.gov\/TemplatePackage\/5.0\/img\/uswds\/icon-https.svg)\n\n**Secure .gov websites use HTTPS**\n\nA **lock** (  ) or **https:\/\/** means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.\n\n[![Centers for Disease Control and Prevention. CDC twenty four seven. Saving Lives, Protecting People](https:\/\/www.cdc.gov\/TemplatePackage\/5.0\/img\/logo\/logo-notext.svg)](https:\/\/www.cdc.gov\/)\n\n[Myalgic Encephalomyelitis\/Chronic Fatigue Syndrome](https:\/\/www.cdc.gov\/me-cfs\/about\/index.html)\n\nExplore This Topic\n\n[For Everyone](https:\/\/www.cdc.gov\/me-cfs\/site.html#gen)\n\n- [About ME\/CFS](https:\/\/www.cdc.gov\/me-cfs\/about\/index.html)\n- [ME\/CFS Symptoms](https:\/\/www.cdc.gov\/me-cfs\/signs-symptoms\/index.html)\n- [ME\/CFS Causes](https:\/\/www.cdc.gov\/me-cfs\/causes\/index.html)\n- [Diagnosis of ME\/CFS](https:\/\/www.cdc.gov\/me-cfs\/diagnosis\/index.html)\n- [Managing Myalgic Encephalomyelitis\/Chronic Fatigue Syndrome](https:\/\/www.cdc.gov\/me-cfs\/management\/index.html)\n- [Living with ME\/CFS](https:\/\/www.cdc.gov\/me-cfs\/living-with\/index.html)\n- [Patient Toolkit](https:\/\/www.cdc.gov\/me-cfs\/toolkit\/index.html)\n- [Stakeholder Engagement and Communication (SEC) calls](https:\/\/www.cdc.gov\/me-cfs\/events\/index.html)\n- [ME\/CFS in Children](https:\/\/www.cdc.gov\/me-cfs\/children\/index.html)\n- [Disability and ME\/CFS](https:\/\/www.cdc.gov\/me-cfs\/disability\/index.html)\n- [ME\/CFS Awareness Day](https:\/\/www.cdc.gov\/me-cfs\/awareness-day\/index.html)\n- [Information on CDC's ME\/CFS Program](https:\/\/www.cdc.gov\/me-cfs\/programs\/index.html)\n- [View all](https:\/\/www.cdc.gov\/me-cfs\/site.html#gen)\n\n[Health Care Providers](https:\/\/www.cdc.gov\/me-cfs\/site.html#hcp)\n\n- [Clinical Overview](https:\/\/www.cdc.gov\/me-cfs\/hcp\/clinical-overview\/index.html)\n- [Diagnosing ME\/CFS](https:\/\/www.cdc.gov\/me-cfs\/hcp\/diagnosis\/index.html)\n- [Clinical Care and Treatment](https:\/\/www.cdc.gov\/me-cfs\/hcp\/clinical-care\/index.html)\n- [Healthcare Provider Toolkit](https:\/\/www.cdc.gov\/me-cfs\/hcp\/toolkit\/index.html)\n- [Training: Medscape Continuing Medical Education (CME)](https:\/\/www.cdc.gov\/me-cfs\/hcp\/training\/index.html)\n- [View all](https:\/\/www.cdc.gov\/me-cfs\/site.html#hcp)\n\n[Home](https:\/\/www.cdc.gov\/me-cfs\/about\/index.html)\n\n[![Centers for Disease Control and Prevention. CDC twenty four seven. Saving Lives, Protecting People](https:\/\/www.cdc.gov\/TemplatePackage\/5.0\/img\/logo\/logo-notext.svg)](https:\/\/www.cdc.gov\/)\n\n[*search*](https:\/\/www.cdc.gov\/me-cfs\/signs-symptoms\/index.html)\n\n[ME\/CFS](https:\/\/www.cdc.gov\/me-cfs\/about\/index.html)\n\nMenu\n\nFor Everyone\n\n- [About ME\/CFS](https:\/\/www.cdc.gov\/me-cfs\/about\/index.html)\n- [ME\/CFS Symptoms](https:\/\/www.cdc.gov\/me-cfs\/signs-symptoms\/index.html)\n- [ME\/CFS Causes](https:\/\/www.cdc.gov\/me-cfs\/causes\/index.html)\n- [Diagnosis of ME\/CFS](https:\/\/www.cdc.gov\/me-cfs\/diagnosis\/index.html)\n- [Managing Myalgic Encephalomyelitis\/Chronic Fatigue Syndrome](https:\/\/www.cdc.gov\/me-cfs\/management\/index.html)\n- [Living with ME\/CFS](https:\/\/www.cdc.gov\/me-cfs\/living-with\/index.html)\n- [Patient Toolkit](https:\/\/www.cdc.gov\/me-cfs\/toolkit\/index.html)\n- [Stakeholder Engagement and Communication (SEC) calls](https:\/\/www.cdc.gov\/me-cfs\/events\/index.html)\n- [View All](https:\/\/www.cdc.gov\/me-cfs\/site.html#gen)\n\nHealth Care Providers\n\n- [Clinical Overview](https:\/\/www.cdc.gov\/me-cfs\/hcp\/clinical-overview\/index.html)\n- [Diagnosing ME\/CFS](https:\/\/www.cdc.gov\/me-cfs\/hcp\/diagnosis\/index.html)\n- [Clinical Care and Treatment](https:\/\/www.cdc.gov\/me-cfs\/hcp\/clinical-care\/index.html)\n- [Healthcare Provider Toolkit](https:\/\/www.cdc.gov\/me-cfs\/hcp\/toolkit\/index.html)\n- [Training: Medscape Continuing Medical Education (CME)](https:\/\/www.cdc.gov\/me-cfs\/hcp\/training\/index.html)\n- [View All](https:\/\/www.cdc.gov\/me-cfs\/site.html#hcp)\n\n[ME\/CFS](https:\/\/www.cdc.gov\/me-cfs\/about\/index.html)\n\n[About ME\/CFS](https:\/\/www.cdc.gov\/me-cfs\/about\/index.html)   [ME\/CFS Symptoms](https:\/\/www.cdc.gov\/me-cfs\/signs-symptoms\/index.html)   [ME\/CFS Causes](https:\/\/www.cdc.gov\/me-cfs\/causes\/index.html)   [Diagnosis of ME\/CFS](https:\/\/www.cdc.gov\/me-cfs\/diagnosis\/index.html)   [Managing Myalgic Encephalomyelitis\/Chronic Fatigue Syndrome](https:\/\/www.cdc.gov\/me-cfs\/management\/index.html)   [Living with ME\/CFS](https:\/\/www.cdc.gov\/me-cfs\/living-with\/index.html)   [Patient Toolkit](https:\/\/www.cdc.gov\/me-cfs\/toolkit\/index.html)   [Stakeholder Engagement and Communication (SEC) calls](https:\/\/www.cdc.gov\/me-cfs\/events\/index.html)   [View Menu](https:\/\/www.cdc.gov\/me-cfs\/signs-symptoms\/index.html)\n\n![](data:image\/jpeg;base64,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)\n\nFor Everyone\n\nMay 10, 2024\n\n[Español](https:\/\/www.cdc.gov\/me-cfs\/es\/signs-symptoms\/sintomas-de-la-encefalomielitis-mialgica-sindrome-de-fatiga-cronica.html)\n# Symptoms of Myalgic Encephalomyelitis\/Chronic Fatigue Syndrome\n## Key points\n- Myalgic encephalomyelitis\/chronic fatigue syndrome symptoms are common in many other illnesses.\n- There is no test to confirm ME\/CFS. This makes it hard to diagnose.\n- Symptoms are unpredictable and may change or come and go over time.\n- However, a combination of core symptoms are used to diagnose ME\/CFS.\n\n![female doctor holding a patient clipboard to discuss and analyze the patient's condition before treating](https:\/\/www.cdc.gov\/me-cfs\/media\/images\/GettyImages-1467814976_1200x675.jpg)\n\n## Primary symptoms\nME\/CFS has five core symptoms. You must have three main ME\/CFS symptoms and at least one of the other two symptoms to be diagnosed with ME\/CFS.\n\n### Less ability to do activities and fatigue (required)\nPeople with ME\/CFS have a much lower ability to do activities they could do before they got sick. This limitation comes with fatigue and lasts six months or longer.\n\nThe fatigue:\n\n- Can be severe\n- Isn't caused by an unusually difficult activity\n- Isn't relieved by sleep or rest\n### Worse symptoms after activity (required)\nPeople with ME\/CFS experience a worsening of their symptoms after any type of activity - physical or mental. These activities wouldn't have been a problem before they became ill. This is called Post-Exertional Malaise (PEM).\n\nPEM can lead to a cycle of \"pushing\" to do more, followed by \"crashing.\" During a crash, people with ME\/CFS may have a variety of symptoms. These can include difficulty thinking, problems sleeping, sore throat, headaches, feeling dizzy, or severe tiredness.\n\nIt may take days, weeks, or longer to recover from a crash. Some people may be confined to bed or the house. As examples:\n\n- Attending a school event may leave someone house-bound for days.\n- Grocery shopping may require a nap in the car before driving home.\n- Doing errands may require getting a ride home.\n- Showering may leave someone bed-bound for days.\n- Working may mean spending nights and weekends recovering.\n### Sleep Problems (Required)\nPeople with ME\/CFS may not feel better or less tired, even after a full night's sleep. Some may have problems falling asleep or staying asleep.\n\n## Additional symptoms (At least 1 required)\nIn addition to the three required symptoms above, one of the following two symptoms is needed to be diagnosed with ME\/CFS.\n\n### Memory and thinking problems\nMost people with ME\/CFS have trouble thinking quickly, remembering things, and paying attention to details. People with ME\/CFS often say they have “brain fog” to describe this problem. This is because they feel “stuck in a fog” and not able to think clearly.\n\n### Problems being upright\nPeople with ME\/CFS often report their symptoms get worse when they are standing or sitting upright. This is called orthostatic intolerance.\n\nPeople with ME\/CFS may be lightheaded, dizzy, weak, or faint while standing or sitting up. They may have vision changes like blurring or seeing spots.\n\n## Other common symptoms\nMany but not all people with ME\/CFS have other symptoms.\n\n**Pain** is very common in people with ME\/CFS. The type of pain, where it occurs, and how bad it is varies a lot. The pain people with ME\/CFS feel is not caused by an injury. The most common types of pain in ME\/CFS are:\n\n- Muscle pain and aches\n- Joint pain without swelling or redness\n- Headaches, either new or worsening\n\nSome people with ME\/CFS may also have:\n\n- Tender lymph nodes in the neck or armpits\n- Frequent sore throat\n- Digestive issues, like irritable bowel syndrome\n- Chills and night sweats\n- Allergies or sensitivities to foods, odors, chemicals, light and noise\n- Muscle weakness\n- Shortness of breath\n- Irregular heartbeat\n\n## On This Page\n- [Primary symptoms](https:\/\/www.cdc.gov\/me-cfs\/signs-symptoms\/index.html#cdc_symptoms_section_1-primary-symptoms)\n- [Additional symptoms (At least 1 required)](https:\/\/www.cdc.gov\/me-cfs\/signs-symptoms\/index.html#cdc_symptoms_section_2-additional-symptoms-at-least-1-required)\n- [Other common symptoms](https:\/\/www.cdc.gov\/me-cfs\/signs-symptoms\/index.html#cdc_symptoms_section_3-other-common-symptoms)\n\n## Related Pages\n- [About ME\/CFS](https:\/\/www.cdc.gov\/me-cfs\/about\/index.html)\n- [ME\/CFS Causes](https:\/\/www.cdc.gov\/me-cfs\/causes\/index.html)\n- [Diagnosis of ME\/CFS](https:\/\/www.cdc.gov\/me-cfs\/diagnosis\/index.html)\n- [Managing Myalgic Encephalomyelitis\/Chronic Fatigue Syndrome](https:\/\/www.cdc.gov\/me-cfs\/management\/index.html)\n- [Living with ME\/CFS](https:\/\/www.cdc.gov\/me-cfs\/living-with\/index.html)\n\n[View All ME\/CFS](https:\/\/www.cdc.gov\/me-cfs\/site.html#gen)\n\n[ME\/CFS Causes](https:\/\/www.cdc.gov\/me-cfs\/causes\/index.html)\n\nMay 10, 2024\n\n[Sources](https:\/\/www.cdc.gov\/me-cfs\/signs-symptoms\/index.html#content-sources) [Print](https:\/\/www.cdc.gov\/me-cfs\/signs-symptoms\/index.html#print) [Share](https:\/\/www.cdc.gov\/me-cfs\/signs-symptoms\/index.html#share)\n\n[Facebook](https:\/\/www.facebook.com\/sharer\/sharer.php?u=https%3A%2F%2Fwww.cdc.gov%2Fme-cfs%2Fsigns-symptoms%2Findex.html \"Share to Facebook\")   [LinkedIn](https:\/\/www.linkedin.com\/shareArticle?url=https%3A%2F%2Fwww.cdc.gov%2Fme-cfs%2Fsigns-symptoms%2Findex.html&title=Symptoms%20of%20Myalgic%20Encephalomyelitis%2FChronic%20Fatigue%20Syndrome \"Share to LinkedIn\")   [Twitter](http:\/\/twitter.com\/share?url=https%3A%2F%2Fwww.cdc.gov%2Fme-cfs%2Fsigns-symptoms%2Findex.html&text=Symptoms%20of%20Myalgic%20Encephalomyelitis%2FChronic%20Fatigue%20Syndrome \"Share to Twitter\")   [Syndicate](https:\/\/tools.cdc.gov\/medialibrary\/index.aspx#\/sharecontent\/https:\/\/https:\/\/www.cdc.gov\/me-cfs\/signs-symptoms\/index.html \"Embed this Page\")\n\nContent Source:\n\n[National Center for Emerging and Zoonotic Infectious Diseases (NCEZID)](https:\/\/www.cdc.gov\/ncezid\/index.html)\n\nSources\n\n- Disclaimer: This website is for informational purposes only. The information provided on this website is not intended to be a substitute for professional medical advice, diagnosis, or treatment.\n\n## Related Pages\n- [About ME\/CFS](https:\/\/www.cdc.gov\/me-cfs\/about\/index.html)\n- [ME\/CFS Causes](https:\/\/www.cdc.gov\/me-cfs\/causes\/index.html)\n- [Diagnosis of ME\/CFS](https:\/\/www.cdc.gov\/me-cfs\/diagnosis\/index.html)\n- [Managing Myalgic Encephalomyelitis\/Chronic Fatigue Syndrome](https:\/\/www.cdc.gov\/me-cfs\/management\/index.html)\n- [Living with ME\/CFS](https:\/\/www.cdc.gov\/me-cfs\/living-with\/index.html)\n\n[View All ME\/CFS](https:\/\/www.cdc.gov\/me-cfs\/site.html#gen)\n\nBack to Top\n\n## [ME\/CFS](https:\/\/www.cdc.gov\/me-cfs\/about\/index.html)\nME\/CFS is a serious, debilitating illness that makes it hard for people to do activities they could previously do without difficulty.\n\n[View All](https:\/\/www.cdc.gov\/me-cfs\/site.html)\n\n### [For Everyone](https:\/\/www.cdc.gov\/me-cfs\/site.html#gen)\n- [About ME\/CFS](https:\/\/www.cdc.gov\/me-cfs\/about\/index.html)\n- [ME\/CFS Symptoms](https:\/\/www.cdc.gov\/me-cfs\/signs-symptoms\/index.html)\n- [ME\/CFS Causes](https:\/\/www.cdc.gov\/me-cfs\/causes\/index.html)\n- [Diagnosis of ME\/CFS](https:\/\/www.cdc.gov\/me-cfs\/diagnosis\/index.html)\n- [Managing Myalgic Encephalomyelitis\/Chronic Fatigue Syndrome](https:\/\/www.cdc.gov\/me-cfs\/management\/index.html)\n- [Living with ME\/CFS](https:\/\/www.cdc.gov\/me-cfs\/living-with\/index.html)\n- [Patient Toolkit](https:\/\/www.cdc.gov\/me-cfs\/toolkit\/index.html)\n- [Stakeholder Engagement and Communication (SEC) calls](https:\/\/www.cdc.gov\/me-cfs\/events\/index.html)\n- [View all](https:\/\/www.cdc.gov\/me-cfs\/site.html#gen)\n\n### [Health Care Providers](https:\/\/www.cdc.gov\/me-cfs\/site.html#hcp)\n- [Clinical Overview](https:\/\/www.cdc.gov\/me-cfs\/hcp\/clinical-overview\/index.html)\n- [Diagnosing ME\/CFS](https:\/\/www.cdc.gov\/me-cfs\/hcp\/diagnosis\/index.html)\n- [Clinical Care and Treatment](https:\/\/www.cdc.gov\/me-cfs\/hcp\/clinical-care\/index.html)\n- [View All](https:\/\/www.cdc.gov\/me-cfs\/site.html#hcp)\n\n[Sign up for Email Updates](https:\/\/tools.cdc.gov\/campaignproxyservice\/subscriptions.aspx#featured)\n\n[Contact Us](https:\/\/www.cdc.gov\/me-cfs\/signs-symptoms\/index.html#contactUs)\n\n[Contact Us](https:\/\/www.cdc.gov\/cdc-info\/index.html)\n\n- [Call 800-232-4636](tel:800-232-4636)\n- [Contact CDC](https:\/\/www.cdc.gov\/cdc-info\/index.html)\n\n[About CDC](https:\/\/www.cdc.gov\/me-cfs\/signs-symptoms\/index.html#aboutCDC)\n\n[About CDC](https:\/\/www.cdc.gov\/about\/)\n\n- [Pressroom](https:\/\/www.cdc.gov\/media\/)\n- [Organization](https:\/\/www.cdc.gov\/about\/organization\/)\n- [Budget & Funding](https:\/\/www.cdc.gov\/budget\/)\n- [Careers & Jobs](https:\/\/jobs.cdc.gov\/index.html)\n\n[Policies](https:\/\/www.cdc.gov\/me-cfs\/signs-symptoms\/index.html#policies)\n\n- 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[日本語](https:\/\/www.cdc.gov\/other\/language-assistance.html#Japanese)\n- [فارسی](https:\/\/www.cdc.gov\/other\/language-assistance.html#Farsi)\n- [English](https:\/\/www.cdc.gov\/other\/language-assistance.html#English)\n\n[Archive](https:\/\/www.cdc.gov\/me-cfs\/signs-symptoms\/index.html#archive)\n\n- [CDC Archive](https:\/\/archive.cdc.gov\/)\n- [Public Health Publications](https:\/\/stacks.cdc.gov\/)\n\n[Contact Us](https:\/\/www.cdc.gov\/me-cfs\/signs-symptoms\/index.html#mobile-footer-contactUs)\n\n[Contact Us](https:\/\/www.cdc.gov\/cdc-info\/index.html)\n\n- [Call 800-232-4636](tel:800-232-4636)\n- [Contact CDC](https:\/\/www.cdc.gov\/cdc-info\/index.html)\n\n[About CDC](https:\/\/www.cdc.gov\/me-cfs\/signs-symptoms\/index.html#mobile-footer-aboutCDC)\n\n- [Pressroom](https:\/\/www.cdc.gov\/media\/)\n- [Organization](https:\/\/www.cdc.gov\/about\/organization\/)\n- [Budget & Funding](https:\/\/www.cdc.gov\/budget\/)\n- [Careers & Jobs](https:\/\/jobs.cdc.gov\/index.html)\n- [About CDC](https:\/\/www.cdc.gov\/about\/)\n\n[Policies](https:\/\/www.cdc.gov\/me-cfs\/signs-symptoms\/index.html#mobile-footer-policies)\n\n- [Accessibility](https:\/\/www.cdc.gov\/other\/accessibility.html)\n- [External Links](https:\/\/www.cdc.gov\/Other\/disclaimer.html#exit-notification)\n- [Privacy](https:\/\/www.cdc.gov\/other\/privacy.html)\n- [Web Policies](https:\/\/www.cdc.gov\/Other\/policies.html)\n\n- [FOIA](https:\/\/www.cdc.gov\/foia\/)\n- [OIG](https:\/\/oig.hhs.gov\/)\n- [No Fear Act](https:\/\/www.cdc.gov\/oeeowe\/no-fear-act\/)\n- [Nondiscrimination](https:\/\/www.cdc.gov\/other\/nondiscrimination.html)\n- [Vulnerability Disclosure Policy](https:\/\/www.hhs.gov\/vulnerability-disclosure-policy\/index.html)\n\n[Languages](https:\/\/www.cdc.gov\/me-cfs\/signs-symptoms\/index.html#mobile-footer-languages)\n\nLanguages\n\n- [Español](https:\/\/www.cdc.gov\/spanish\/)\n\nLanguage Assistance\n\n- [Español](https:\/\/www.cdc.gov\/other\/language-assistance.html#Spanish)\n- [繁體中文](https:\/\/www.cdc.gov\/other\/language-assistance.html#Chinese)\n- [Tiếng Việt](https:\/\/www.cdc.gov\/other\/language-assistance.html#Vietnamese)\n- [한국어](https:\/\/www.cdc.gov\/other\/language-assistance.html#Korean)\n- [Tagalog](https:\/\/www.cdc.gov\/other\/language-assistance.html#Tagalog)\n- [Русский](https:\/\/www.cdc.gov\/other\/language-assistance.html#Russian)\n- [العربية](https:\/\/www.cdc.gov\/other\/language-assistance.html#Arabic)\n- [Kreyòl Ayisyen](https:\/\/www.cdc.gov\/other\/language-assistance.html#Haitian)\n- [Français](https:\/\/www.cdc.gov\/other\/language-assistance.html#French)\n- [Polski](https:\/\/www.cdc.gov\/other\/language-assistance.html#Polish)\n- [Português](https:\/\/www.cdc.gov\/other\/language-assistance.html#Portuguese)\n- [Italiano](https:\/\/www.cdc.gov\/other\/language-assistance.html#Italian)\n- [Deutsch](https:\/\/www.cdc.gov\/other\/language-assistance.html#German)\n- [日本語](https:\/\/www.cdc.gov\/other\/language-assistance.html#Japanese)\n- [فارسی](https:\/\/www.cdc.gov\/other\/language-assistance.html#Farsi)\n- [English](https:\/\/www.cdc.gov\/other\/language-assistance.html#English)\n\n[Archive](https:\/\/www.cdc.gov\/me-cfs\/signs-symptoms\/index.html#mobile-footer-archive)\n\n- [CDC Archive](https:\/\/archive.cdc.gov\/)\n- [Public Health Publications](https:\/\/stacks.cdc.gov\/)\n\n[![Centers for Disease Control and Prevention](https:\/\/www.cdc.gov\/TemplatePackage\/5.0\/img\/logo\/cdc-logo-tag-right.svg)](https:\/\/www.cdc.gov\/)\n\n[HHS.gov](https:\/\/hhs.gov\/) [USA.gov](https:\/\/usa.gov\/)","attrs_readable_markdown":"- Myalgic encephalomyelitis\/chronic fatigue syndrome symptoms are common in many other illnesses.\n- There is no test to confirm ME\/CFS. This makes it hard to diagnose.\n- Symptoms are unpredictable and may change or come and go over time.\n- However, a combination of core symptoms are used to diagnose ME\/CFS.\n\n![female doctor holding a patient clipboard to discuss and analyze the patient's condition before treating](https:\/\/www.cdc.gov\/me-cfs\/media\/images\/GettyImages-1467814976_1200x675.jpg)\n\n## Primary symptoms\nME\/CFS has five core symptoms. You must have three main ME\/CFS symptoms and at least one of the other two symptoms to be diagnosed with ME\/CFS.\n\n### Less ability to do activities and fatigue (required)\nPeople with ME\/CFS have a much lower ability to do activities they could do before they got sick. This limitation comes with fatigue and lasts six months or longer.\n\nThe fatigue:\n\n- Can be severe\n- Isn't caused by an unusually difficult activity\n- Isn't relieved by sleep or rest\n### Worse symptoms after activity (required)\nPeople with ME\/CFS experience a worsening of their symptoms after any type of activity - physical or mental. These activities wouldn't have been a problem before they became ill. This is called Post-Exertional Malaise (PEM).\n\nPEM can lead to a cycle of \"pushing\" to do more, followed by \"crashing.\" During a crash, people with ME\/CFS may have a variety of symptoms. These can include difficulty thinking, problems sleeping, sore throat, headaches, feeling dizzy, or severe tiredness.\n\nIt may take days, weeks, or longer to recover from a crash. Some people may be confined to bed or the house. As examples:\n\n- Attending a school event may leave someone house-bound for days.\n- Grocery shopping may require a nap in the car before driving home.\n- Doing errands may require getting a ride home.\n- Showering may leave someone bed-bound for days.\n- Working may mean spending nights and weekends recovering.\n### Sleep Problems (Required)\nPeople with ME\/CFS may not feel better or less tired, even after a full night's sleep. Some may have problems falling asleep or staying asleep.\n\n## Additional symptoms (At least 1 required)\nIn addition to the three required symptoms above, one of the following two symptoms is needed to be diagnosed with ME\/CFS.\n\n### Memory and thinking problems\nMost people with ME\/CFS have trouble thinking quickly, remembering things, and paying attention to details. People with ME\/CFS often say they have “brain fog” to describe this problem. This is because they feel “stuck in a fog” and not able to think clearly.\n\n### Problems being upright\nPeople with ME\/CFS often report their symptoms get worse when they are standing or sitting upright. This is called orthostatic intolerance.\n\nPeople with ME\/CFS may be lightheaded, dizzy, weak, or faint while standing or sitting up. They may have vision changes like blurring or seeing spots.\n\n## Other common symptoms\nMany but not all people with ME\/CFS have other symptoms.\n\n**Pain** is very common in people with ME\/CFS. The type of pain, where it occurs, and how bad it is varies a lot. The pain people with ME\/CFS feel is not caused by an injury. The most common types of pain in ME\/CFS are:\n\n- Muscle pain and aches\n- Joint pain without swelling or redness\n- Headaches, either new or worsening\n\nSome people with ME\/CFS may also have:\n\n- Tender lymph nodes in the neck or armpits\n- Frequent sore throat\n- Digestive issues, like irritable bowel syndrome\n- Chills and night sweats\n- Allergies or sensitivities to foods, odors, chemicals, light and noise\n- Muscle weakness\n- Shortness of breath\n- Irregular heartbeat\n\nMay 10, 2024\n\nSources\n\n- Disclaimer: This website is for informational purposes only. The information provided on this website is not intended to be a substitute for professional medical advice, diagnosis, or treatment.","meta_canonical":null}

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URL	https://www.cdc.gov/me-cfs/signs-symptoms/index.html
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Meta Title	Symptoms of Myalgic Encephalomyelitis/Chronic Fatigue Syndrome \| ME/CFS \| CDC
Meta Description	ME/CFS has 5 core symptoms. Diagnosis requires 3 main symptoms and at least 1 other symptom
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Boilerpipe Text	Myalgic encephalomyelitis/chronic fatigue syndrome symptoms are common in many other illnesses. There is no test to confirm ME/CFS. This makes it hard to diagnose. Symptoms are unpredictable and may change or come and go over time. However, a combination of core symptoms are used to diagnose ME/CFS. Primary symptoms ME/CFS has five core symptoms. You must have three main ME/CFS symptoms and at least one of the other two symptoms to be diagnosed with ME/CFS. Less ability to do activities and fatigue (required) People with ME/CFS have a much lower ability to do activities they could do before they got sick. This limitation comes with fatigue and lasts six months or longer. The fatigue: Can be severe Isn't caused by an unusually difficult activity Isn't relieved by sleep or rest Worse symptoms after activity (required) People with ME/CFS experience a worsening of their symptoms after any type of activity - physical or mental. These activities wouldn't have been a problem before they became ill. This is called Post-Exertional Malaise (PEM). PEM can lead to a cycle of "pushing" to do more, followed by "crashing." During a crash, people with ME/CFS may have a variety of symptoms. These can include difficulty thinking, problems sleeping, sore throat, headaches, feeling dizzy, or severe tiredness. It may take days, weeks, or longer to recover from a crash. Some people may be confined to bed or the house. As examples: Attending a school event may leave someone house-bound for days. Grocery shopping may require a nap in the car before driving home. Doing errands may require getting a ride home. Showering may leave someone bed-bound for days. Working may mean spending nights and weekends recovering. Sleep Problems (Required) People with ME/CFS may not feel better or less tired, even after a full night's sleep. Some may have problems falling asleep or staying asleep. Additional symptoms (At least 1 required) In addition to the three required symptoms above, one of the following two symptoms is needed to be diagnosed with ME/CFS. Memory and thinking problems Most people with ME/CFS have trouble thinking quickly, remembering things, and paying attention to details. People with ME/CFS often say they have “brain fog” to describe this problem. This is because they feel “stuck in a fog” and not able to think clearly. Problems being upright People with ME/CFS often report their symptoms get worse when they are standing or sitting upright. This is called orthostatic intolerance. People with ME/CFS may be lightheaded, dizzy, weak, or faint while standing or sitting up. They may have vision changes like blurring or seeing spots. Other common symptoms Many but not all people with ME/CFS have other symptoms. Pain is very common in people with ME/CFS. The type of pain, where it occurs, and how bad it is varies a lot. The pain people with ME/CFS feel is not caused by an injury. The most common types of pain in ME/CFS are: Muscle pain and aches Joint pain without swelling or redness Headaches, either new or worsening Some people with ME/CFS may also have: Tender lymph nodes in the neck or armpits Frequent sore throat Digestive issues, like irritable bowel syndrome Chills and night sweats Allergies or sensitivities to foods, odors, chemicals, light and noise Muscle weakness Shortness of breath Irregular heartbeat May 10, 2024 Sources Disclaimer: This website is for informational purposes only. The information provided on this website is not intended to be a substitute for professional medical advice, diagnosis, or treatment.
Markdown	[Skip directly to site content](https://www.cdc.gov/me-cfs/signs-symptoms/index.html#content) [Skip directly to search](https://www.cdc.gov/me-cfs/signs-symptoms/index.html#cdc-search) [Skip directly to On This Page](https://www.cdc.gov/me-cfs/signs-symptoms/index.html#first-on-this-page) ![](https://www.cdc.gov/TemplatePackage/5.0/img/uswds/us_flag_small.png) An official website of the United States government [Here's how you know](https://www.cdc.gov/me-cfs/signs-symptoms/index.html#gov-notice) ![](https://www.cdc.gov/TemplatePackage/5.0/img/uswds/icon-dot-gov.svg) Official websites use .gov A .gov website belongs to an official government organization in the United States. ![](https://www.cdc.gov/TemplatePackage/5.0/img/uswds/icon-https.svg) Secure .gov websites use HTTPS A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites. [![Centers for Disease Control and Prevention. CDC twenty four seven. Saving Lives, Protecting People](https://www.cdc.gov/TemplatePackage/5.0/img/logo/logo-notext.svg)](https://www.cdc.gov/) [Myalgic Encephalomyelitis/Chronic Fatigue Syndrome](https://www.cdc.gov/me-cfs/about/index.html) Explore This Topic [For Everyone](https://www.cdc.gov/me-cfs/site.html#gen) - [About ME/CFS](https://www.cdc.gov/me-cfs/about/index.html) - [ME/CFS Symptoms](https://www.cdc.gov/me-cfs/signs-symptoms/index.html) - [ME/CFS Causes](https://www.cdc.gov/me-cfs/causes/index.html) - [Diagnosis of ME/CFS](https://www.cdc.gov/me-cfs/diagnosis/index.html) - [Managing Myalgic Encephalomyelitis/Chronic Fatigue Syndrome](https://www.cdc.gov/me-cfs/management/index.html) - [Living with ME/CFS](https://www.cdc.gov/me-cfs/living-with/index.html) - [Patient Toolkit](https://www.cdc.gov/me-cfs/toolkit/index.html) - [Stakeholder Engagement and Communication (SEC) calls](https://www.cdc.gov/me-cfs/events/index.html) - [ME/CFS in Children](https://www.cdc.gov/me-cfs/children/index.html) - [Disability and ME/CFS](https://www.cdc.gov/me-cfs/disability/index.html) - [ME/CFS Awareness Day](https://www.cdc.gov/me-cfs/awareness-day/index.html) - [Information on CDC's ME/CFS Program](https://www.cdc.gov/me-cfs/programs/index.html) - [View all](https://www.cdc.gov/me-cfs/site.html#gen) [Health Care Providers](https://www.cdc.gov/me-cfs/site.html#hcp) - [Clinical Overview](https://www.cdc.gov/me-cfs/hcp/clinical-overview/index.html) - [Diagnosing ME/CFS](https://www.cdc.gov/me-cfs/hcp/diagnosis/index.html) - [Clinical Care and Treatment](https://www.cdc.gov/me-cfs/hcp/clinical-care/index.html) - [Healthcare Provider Toolkit](https://www.cdc.gov/me-cfs/hcp/toolkit/index.html) - [Training: Medscape Continuing Medical Education (CME)](https://www.cdc.gov/me-cfs/hcp/training/index.html) - [View all](https://www.cdc.gov/me-cfs/site.html#hcp) [Home](https://www.cdc.gov/me-cfs/about/index.html) [![Centers for Disease Control and Prevention. CDC twenty four seven. Saving Lives, Protecting People](https://www.cdc.gov/TemplatePackage/5.0/img/logo/logo-notext.svg)](https://www.cdc.gov/) [search](https://www.cdc.gov/me-cfs/signs-symptoms/index.html) [ME/CFS](https://www.cdc.gov/me-cfs/about/index.html) Menu For Everyone - [About ME/CFS](https://www.cdc.gov/me-cfs/about/index.html) - [ME/CFS Symptoms](https://www.cdc.gov/me-cfs/signs-symptoms/index.html) - [ME/CFS Causes](https://www.cdc.gov/me-cfs/causes/index.html) - [Diagnosis of ME/CFS](https://www.cdc.gov/me-cfs/diagnosis/index.html) - [Managing Myalgic Encephalomyelitis/Chronic Fatigue Syndrome](https://www.cdc.gov/me-cfs/management/index.html) - [Living with ME/CFS](https://www.cdc.gov/me-cfs/living-with/index.html) - [Patient Toolkit](https://www.cdc.gov/me-cfs/toolkit/index.html) - [Stakeholder Engagement and Communication (SEC) calls](https://www.cdc.gov/me-cfs/events/index.html) - [View All](https://www.cdc.gov/me-cfs/site.html#gen) Health Care Providers - [Clinical Overview](https://www.cdc.gov/me-cfs/hcp/clinical-overview/index.html) - [Diagnosing ME/CFS](https://www.cdc.gov/me-cfs/hcp/diagnosis/index.html) - [Clinical Care and Treatment](https://www.cdc.gov/me-cfs/hcp/clinical-care/index.html) - [Healthcare Provider Toolkit](https://www.cdc.gov/me-cfs/hcp/toolkit/index.html) - [Training: Medscape Continuing Medical Education (CME)](https://www.cdc.gov/me-cfs/hcp/training/index.html) - [View All](https://www.cdc.gov/me-cfs/site.html#hcp) [ME/CFS](https://www.cdc.gov/me-cfs/about/index.html) [About ME/CFS](https://www.cdc.gov/me-cfs/about/index.html) [ME/CFS Symptoms](https://www.cdc.gov/me-cfs/signs-symptoms/index.html) [ME/CFS Causes](https://www.cdc.gov/me-cfs/causes/index.html) [Diagnosis of ME/CFS](https://www.cdc.gov/me-cfs/diagnosis/index.html) [Managing Myalgic Encephalomyelitis/Chronic Fatigue Syndrome](https://www.cdc.gov/me-cfs/management/index.html) [Living with ME/CFS](https://www.cdc.gov/me-cfs/living-with/index.html) [Patient Toolkit](https://www.cdc.gov/me-cfs/toolkit/index.html) [Stakeholder Engagement and Communication (SEC) calls](https://www.cdc.gov/me-cfs/events/index.html) [View Menu](https://www.cdc.gov/me-cfs/signs-symptoms/index.html) 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) For Everyone May 10, 2024 [Español](https://www.cdc.gov/me-cfs/es/signs-symptoms/sintomas-de-la-encefalomielitis-mialgica-sindrome-de-fatiga-cronica.html) # Symptoms of Myalgic Encephalomyelitis/Chronic Fatigue Syndrome ## Key points - Myalgic encephalomyelitis/chronic fatigue syndrome symptoms are common in many other illnesses. - There is no test to confirm ME/CFS. This makes it hard to diagnose. - Symptoms are unpredictable and may change or come and go over time. - However, a combination of core symptoms are used to diagnose ME/CFS. ![female doctor holding a patient clipboard to discuss and analyze the patient's condition before treating](https://www.cdc.gov/me-cfs/media/images/GettyImages-1467814976_1200x675.jpg) ## Primary symptoms ME/CFS has five core symptoms. You must have three main ME/CFS symptoms and at least one of the other two symptoms to be diagnosed with ME/CFS. ### Less ability to do activities and fatigue (required) People with ME/CFS have a much lower ability to do activities they could do before they got sick. This limitation comes with fatigue and lasts six months or longer. The fatigue: - Can be severe - Isn't caused by an unusually difficult activity - Isn't relieved by sleep or rest ### Worse symptoms after activity (required) People with ME/CFS experience a worsening of their symptoms after any type of activity - physical or mental. These activities wouldn't have been a problem before they became ill. This is called Post-Exertional Malaise (PEM). PEM can lead to a cycle of "pushing" to do more, followed by "crashing." During a crash, people with ME/CFS may have a variety of symptoms. These can include difficulty thinking, problems sleeping, sore throat, headaches, feeling dizzy, or severe tiredness. It may take days, weeks, or longer to recover from a crash. Some people may be confined to bed or the house. As examples: - Attending a school event may leave someone house-bound for days. - Grocery shopping may require a nap in the car before driving home. - Doing errands may require getting a ride home. - Showering may leave someone bed-bound for days. - Working may mean spending nights and weekends recovering. ### Sleep Problems (Required) People with ME/CFS may not feel better or less tired, even after a full night's sleep. Some may have problems falling asleep or staying asleep. ## Additional symptoms (At least 1 required) In addition to the three required symptoms above, one of the following two symptoms is needed to be diagnosed with ME/CFS. ### Memory and thinking problems Most people with ME/CFS have trouble thinking quickly, remembering things, and paying attention to details. People with ME/CFS often say they have “brain fog” to describe this problem. This is because they feel “stuck in a fog” and not able to think clearly. ### Problems being upright People with ME/CFS often report their symptoms get worse when they are standing or sitting upright. This is called orthostatic intolerance. People with ME/CFS may be lightheaded, dizzy, weak, or faint while standing or sitting up. They may have vision changes like blurring or seeing spots. ## Other common symptoms Many but not all people with ME/CFS have other symptoms. Pain is very common in people with ME/CFS. The type of pain, where it occurs, and how bad it is varies a lot. The pain people with ME/CFS feel is not caused by an injury. The most common types of pain in ME/CFS are: - Muscle pain and aches - Joint pain without swelling or redness - Headaches, either new or worsening Some people with ME/CFS may also have: - Tender lymph nodes in the neck or armpits - Frequent sore throat - Digestive issues, like irritable bowel syndrome - Chills and night sweats - Allergies or sensitivities to foods, odors, chemicals, light and noise - Muscle weakness - Shortness of breath - Irregular heartbeat ## On This Page - [Primary symptoms](https://www.cdc.gov/me-cfs/signs-symptoms/index.html#cdc_symptoms_section_1-primary-symptoms) - [Additional symptoms (At least 1 required)](https://www.cdc.gov/me-cfs/signs-symptoms/index.html#cdc_symptoms_section_2-additional-symptoms-at-least-1-required) - [Other common symptoms](https://www.cdc.gov/me-cfs/signs-symptoms/index.html#cdc_symptoms_section_3-other-common-symptoms) ## Related Pages - [About ME/CFS](https://www.cdc.gov/me-cfs/about/index.html) - [ME/CFS Causes](https://www.cdc.gov/me-cfs/causes/index.html) - [Diagnosis of ME/CFS](https://www.cdc.gov/me-cfs/diagnosis/index.html) - [Managing Myalgic Encephalomyelitis/Chronic Fatigue Syndrome](https://www.cdc.gov/me-cfs/management/index.html) - [Living with ME/CFS](https://www.cdc.gov/me-cfs/living-with/index.html) [View All ME/CFS](https://www.cdc.gov/me-cfs/site.html#gen) [ME/CFS Causes](https://www.cdc.gov/me-cfs/causes/index.html) May 10, 2024 [Sources](https://www.cdc.gov/me-cfs/signs-symptoms/index.html#content-sources) [Print](https://www.cdc.gov/me-cfs/signs-symptoms/index.html#print) [Share](https://www.cdc.gov/me-cfs/signs-symptoms/index.html#share) [Facebook](https://www.facebook.com/sharer/sharer.php?u=https%3A%2F%2Fwww.cdc.gov%2Fme-cfs%2Fsigns-symptoms%2Findex.html "Share to Facebook") [LinkedIn](https://www.linkedin.com/shareArticle?url=https%3A%2F%2Fwww.cdc.gov%2Fme-cfs%2Fsigns-symptoms%2Findex.html&title=Symptoms%20of%20Myalgic%20Encephalomyelitis%2FChronic%20Fatigue%20Syndrome "Share to LinkedIn") [Twitter](http://twitter.com/share?url=https%3A%2F%2Fwww.cdc.gov%2Fme-cfs%2Fsigns-symptoms%2Findex.html&text=Symptoms%20of%20Myalgic%20Encephalomyelitis%2FChronic%20Fatigue%20Syndrome "Share to Twitter") [Syndicate](https://tools.cdc.gov/medialibrary/index.aspx#/sharecontent/https://https://www.cdc.gov/me-cfs/signs-symptoms/index.html "Embed this Page") Content Source: [National Center for Emerging and Zoonotic Infectious Diseases (NCEZID)](https://www.cdc.gov/ncezid/index.html) Sources - Disclaimer: This website is for informational purposes only. The information provided on this website is not intended to be a substitute for professional medical advice, diagnosis, or treatment. ## Related Pages - [About ME/CFS](https://www.cdc.gov/me-cfs/about/index.html) - [ME/CFS Causes](https://www.cdc.gov/me-cfs/causes/index.html) - [Diagnosis of ME/CFS](https://www.cdc.gov/me-cfs/diagnosis/index.html) - [Managing Myalgic Encephalomyelitis/Chronic Fatigue Syndrome](https://www.cdc.gov/me-cfs/management/index.html) - [Living with ME/CFS](https://www.cdc.gov/me-cfs/living-with/index.html) [View All ME/CFS](https://www.cdc.gov/me-cfs/site.html#gen) Back to Top ## [ME/CFS](https://www.cdc.gov/me-cfs/about/index.html) ME/CFS is a serious, debilitating illness that makes it hard for people to do activities they could previously do without difficulty. 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Readable Markdown	- Myalgic encephalomyelitis/chronic fatigue syndrome symptoms are common in many other illnesses. - There is no test to confirm ME/CFS. This makes it hard to diagnose. - Symptoms are unpredictable and may change or come and go over time. - However, a combination of core symptoms are used to diagnose ME/CFS. ![female doctor holding a patient clipboard to discuss and analyze the patient's condition before treating](https://www.cdc.gov/me-cfs/media/images/GettyImages-1467814976_1200x675.jpg) ## Primary symptoms ME/CFS has five core symptoms. You must have three main ME/CFS symptoms and at least one of the other two symptoms to be diagnosed with ME/CFS. ### Less ability to do activities and fatigue (required) People with ME/CFS have a much lower ability to do activities they could do before they got sick. This limitation comes with fatigue and lasts six months or longer. The fatigue: - Can be severe - Isn't caused by an unusually difficult activity - Isn't relieved by sleep or rest ### Worse symptoms after activity (required) People with ME/CFS experience a worsening of their symptoms after any type of activity - physical or mental. These activities wouldn't have been a problem before they became ill. This is called Post-Exertional Malaise (PEM). PEM can lead to a cycle of "pushing" to do more, followed by "crashing." During a crash, people with ME/CFS may have a variety of symptoms. These can include difficulty thinking, problems sleeping, sore throat, headaches, feeling dizzy, or severe tiredness. It may take days, weeks, or longer to recover from a crash. Some people may be confined to bed or the house. As examples: - Attending a school event may leave someone house-bound for days. - Grocery shopping may require a nap in the car before driving home. - Doing errands may require getting a ride home. - Showering may leave someone bed-bound for days. - Working may mean spending nights and weekends recovering. ### Sleep Problems (Required) People with ME/CFS may not feel better or less tired, even after a full night's sleep. Some may have problems falling asleep or staying asleep. ## Additional symptoms (At least 1 required) In addition to the three required symptoms above, one of the following two symptoms is needed to be diagnosed with ME/CFS. ### Memory and thinking problems Most people with ME/CFS have trouble thinking quickly, remembering things, and paying attention to details. People with ME/CFS often say they have “brain fog” to describe this problem. This is because they feel “stuck in a fog” and not able to think clearly. ### Problems being upright People with ME/CFS often report their symptoms get worse when they are standing or sitting upright. This is called orthostatic intolerance. People with ME/CFS may be lightheaded, dizzy, weak, or faint while standing or sitting up. They may have vision changes like blurring or seeing spots. ## Other common symptoms Many but not all people with ME/CFS have other symptoms. Pain is very common in people with ME/CFS. The type of pain, where it occurs, and how bad it is varies a lot. The pain people with ME/CFS feel is not caused by an injury. The most common types of pain in ME/CFS are: - Muscle pain and aches - Joint pain without swelling or redness - Headaches, either new or worsening Some people with ME/CFS may also have: - Tender lymph nodes in the neck or armpits - Frequent sore throat - Digestive issues, like irritable bowel syndrome - Chills and night sweats - Allergies or sensitivities to foods, odors, chemicals, light and noise - Muscle weakness - Shortness of breath - Irregular heartbeat May 10, 2024 Sources - Disclaimer: This website is for informational purposes only. The information provided on this website is not intended to be a substitute for professional medical advice, diagnosis, or treatment.
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