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| Meta Title | Should You Be Concerned About Your Fatigue? |
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| Boilerpipe Text | Key Takeaways
Fatigue is a common symptom that can affect your physical and mental health and can often be resolved with rest or reduced activity.
Many illnesses and lifestyle factors can cause fatigue, but strategies like getting enough sleep, exercising regularly, and eating a healthy diet may help to manage symptoms.
Chronic fatigue lasts six months or more and impacts daily life, so it's important to talk to a healthcare provider.
Fatigue is a feeling of intense exhaustion and lack of motivation that doesn't simply disappear with a good night's rest. Many health conditions and lifestyle factors can cause fatigue, and the symptoms can be physical, psychological, or a combination of both.
It's essential to determine the cause of your fatigue to receive effective treatment.Â
Verywell / Lara Antal
What Does Fatigue Feel Like?
A 2019 report in the journal
Biological Research for Nursing
defines fatigue as an “overwhelming, debilitating, and sustained” exhaustion that makes it harder to carry out activities and function.
Family physicians note that at least 20% of patients and up to 35% of adolescents report fatigue at least four days a week.
Men and women will describe fatigue differently. For example, men may say they are feeling tired, whereas
women may link their fatigue
to anxiety or depression.
People may also describe fatigue as feeling exhausted, weary, listless, or rundown.
People with fatigue often experience:
Lack of motivation or the ability to start activities
Getting tired easily
Experiencing mental fatigue or problems with concentration or memory
Often, fatigue is a symptom with a gradual onset, meaning it comes on slowly and gets worse with time. Most people who experience fatigue may not be aware early on how much energy they are losing. They can only determine this when they try to compare their ability to perform tasks from one time frame to another.
Further, they may think fatigue is a common symptom—due to aging, being busy or overworked, not getting enough sleep, or a combination of all of these—and ignore the symptom.Â
Don't ignore fatigue or delay seeking out medical care to determine the source of your fatigue. Your healthcare provider can help you pinpoint the cause and improve your quality of life.
Common Symptoms
Though fatigue is a symptom of an underlying condition, it can cause mental and physical symptoms, such as:
Weakness
Lack of energy
Constant tiredness or exhaustion
Lack of motivation
Difficulty with concentration
Trouble starting and completing tasks
Additional Symptoms
Fatigue is generally not a lone symptom. With it usually come other symptoms that can help your healthcare provider to determine the cause or causes of your fatigue.
Additional symptoms that may accompany fatigue include:
Headache
Dizziness
Sore or aching muscles
Muscle weakness
Slowed reflexes
Impaired judgment
Moodiness and irritability
Loss of appetiteÂ
Impaired coordination (affecting activities such as driving)
Weakened immune function
Attention and memory issues
Blurry vision
Chronic Fatigue Syndrome
Fatigue is considered chronic when the feelings of exhaustion or lack of energy have lasted six or more months. Regardless of the cause, chronic fatigue will impact a person’s day-to-day functioning and quality of life.
A diagnosis of
chronic fatigue syndrome (CFS)
is made if a person has experienced chronic and ongoing fatigue for six months or more with no known cause, that is not improved with sleep or rest, and that gets worse with physical or mental activity.
Symptoms of CFS can affect different parts of the body and may include unrefreshing sleep, weakness of muscles or joints, problems with memory and concentration, and headaches. Symptoms can be mild, moderate, or severe, and may come and go or last for weeks or months at a time. They can come on gradually or suddenly.
Factors That Contribute to Fatigue
Many factors can cause fatigue. It's a possible symptom of most medical illnesses.
Chronic and severe fatigue can stem from medical issues, lifestyle choices, or stress (both work-related and emotional).
Normal fatigue—that is, fatigue that occurs from mental or physical exertion—is not unusual. However, normal fatigue can become abnormal if it becomes chronic (long-lasting) or severe.
Medical
Medical causes of fatigue may cause unrelenting exhaustion with additional symptoms. There are a number of diseases that trigger fatigue. If you find yourself experiencing long periods of fatigue, talk to your healthcare provider to determine the root cause.
The medical causes of fatigue can be classified under broad disease categories. Some of these disease categories include:
Metabolic/endocrine
: Conditions such as anemia, diabetes, hormonal imbalances, or liver or kidney disease
Infections
: Influenza, tuberculosis, or malaria
Cardiac (heart) and pulmonary (lungs)
: Congestive heart failure, chronic obstructive pulmonary disease (COPD), arrhythmias, and asthma
Sleep problems
: Sleep apnea, insomnia, and restless leg syndrome
Vitamin deficiencies
:Â Vitamin D deficiency, vitamin B12 deficiency, or iron deficiency
Other conditions
:
Cancers
and rheumatic/autoimmune diseases
Medications
you are taking to treat other health conditions may also cause fatigue. This can include anti-depressants and anti-anxiety medications, sedative medication, some blood pressure medications, chemotherapy, radiation therapy, and steroids.
Lifestyle
Lifestyle causes include:
Sleep disturbances
: If you are not getting enough sleep, too much sleep, or waking up during the night, you may experience daytime fatigue.
Diet
: If you are eating a lot of high-carb, high-fat, or quick-fix foods, sugary foods and drinks, or caffeinated drinks, you are not providing your body enough fuel or nutrients to function at its best. Moreover, these foods may cause you to experience energy boosts that quickly wear off, leading to a "crash" and worsening fatigue.
Alcohol and drugs
: Alcohol is a depressant that will slow down the nervous system and disturb sleep. Cigarettes and caffeine will stimulate the nervous system and cause you trouble with falling asleep and staying asleep.
Lack of regular activity
: Physical activity is known for improving your health and well-being, reducing stress, and improving your energy levels. It will also help you sleep better and reduce daytime fatigue.
Individual factors
: Personal or family illness or injury, having too many commitments, and financial problems can cause a person to feel fatigued.
Mental Health
A loss of energy may be related to mental health problems such as:
Depression
Anxiety
Grief
These conditions exhaust the body physically and emotionally and cause severe fatigue to set in.
Workplace-Related Fatigue
Night shift workers may experience daytime fatigue as it disrupts the body's natural circadian rhythm, which is designed for nighttime sleep.
Poor workplace practices that can also contribute to fatigue include:
Irregular working hours
Physical labor
Long hours
Noisy workplaces
Fixed concentration
Repetitive tasks
Fatigue may also be caused by the following workplace stressors:
Heavy workload
Conflict with bosses or coworkers
Workplace bullying
Threats to job security
How Healthcare Providers Diagnose Fatigue
Fatigue presents with a range of symptoms and is often caused by several different factors working in combination. That makes finding a diagnosis more difficult. Therefore, your healthcare provider will try to determine what is causing fatigue using a number of tests, including the following:
Medical history
: Your healthcare provider will ask about recent stressful (good and bad) events in your life, such as the birth of a child, surgery, work stress and family problems, or other symptoms you have experienced in addition to fatigue.
Physical exam
: A physical exam will help your practitioner check for signs of disease. Your medical professional may also ask about your current diet and lifestyle.
Testing
: Tests can include blood work, urine screens, X-rays, and other imaging. Your healthcare provider will want to rule out physical causes.
When to See a Healthcare Provider
You should see your healthcare provider if your fatigue:
Has come on suddenly and is not the result of normal short-term physical or mental stress  Â
Is not relieved by rest, sleep, or the removal of stressors
Has become severe or chronic
Is accompanied by other unexplained symptoms
Associated with weakness,
fainting, or near fainting
Is accompanied by unexplained weight loss, masses or lumps anywhere on the body,
fever (greater than 101 degrees Fahrenheit)
, abnormal bleeding, and/or unexplained pain anywhere in the body
Signs of a Medical Emergency
Go to your local hospital emergency department if you experience the following symptoms, with or without fatigue:
Fainting
Chest pain
Shortness of breath
Bleeding (e.g., vomiting blood or rectal bleeding)
Severe abdominal, pelvic, or back pain
Severe headache
Irregular or fast heart rate
Effective Ways to Combat Fatigue
Treatment for fatigue depends on the causes. Some treatments for conditions that cause fatigue include medications, vitamins, diet, exercise, and avoiding unhealthy habits such as smoking, using drugs, or drinking alcohol in excess.
Fortunately, many of the causes of fatigue are treatable. For example, anemia can be treated with iron supplements, sleep apnea can be treated with medicine and CPAP machines, medications can maintain blood sugar and blood pressure, antibiotics can treat infections, and vitamins can regulate vitamin deficiencies.
There are also several things you can do to lessen fatigue caused by daily activity and boost energy levels and overall health. These include:
Staying hydrated
Eating healthy foods
Exercising regularly
Getting enough sleep
Avoiding known stressors
Avoiding over-demanding work and social schedules
Practicing relaxation activities, such as yoga
You should also check with your healthcare provider for mental health issues like anxiety and depression.
Lifestyle changes help ease fatigue, but it is also important to follow your healthcare provider’s treatment plan for any diagnosed medical condition. Left untreated, fatigue can negatively affect your physical and mental health. |
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# Should You Be Concerned About Your Fatigue?
By [Lana Barhum](https://www.verywellhealth.com/lana-barhum-4173343)
Updated on November 03, 2025
Medically reviewed by [Isaac O. Opole, MD, PhD](https://www.verywellhealth.com/isaac-opole-md-phd-4774747)
Table of Contents
View All
Table of Contents
- [Symptoms](https://www.verywellhealth.com/fatigue-symptoms-causes-diagnosis-and-treatment-4768481#toc-what-does-fatigue-feel-like)
- [Factors That Contribute to Fatigue](https://www.verywellhealth.com/fatigue-symptoms-causes-diagnosis-and-treatment-4768481#toc-factors-that-contribute-to-fatigue)
- [Diagnosis](https://www.verywellhealth.com/fatigue-symptoms-causes-diagnosis-and-treatment-4768481#toc-how-healthcare-providers-diagnose-fatigue)
- [Treatment](https://www.verywellhealth.com/fatigue-symptoms-causes-diagnosis-and-treatment-4768481#toc-effective-ways-to-combat-fatigue)
### Key Takeaways
- Fatigue is a common symptom that can affect your physical and mental health and can often be resolved with rest or reduced activity.
- Many illnesses and lifestyle factors can cause fatigue, but strategies like getting enough sleep, exercising regularly, and eating a healthy diet may help to manage symptoms.
- Chronic fatigue lasts six months or more and impacts daily life, so it's important to talk to a healthcare provider.
Fatigue is a feeling of intense exhaustion and lack of motivation that doesn't simply disappear with a good night's rest. Many health conditions and lifestyle factors can cause fatigue, and the symptoms can be physical, psychological, or a combination of both. It's essential to determine the cause of your fatigue to receive effective treatment.
![tips for treating fatigue]()
:max_bytes\(150000\):strip_icc\(\)/fatigue-symptoms-causes-diagnosis-and-treatment-4768481-v1-739a8adb0d6643efb6159799ebff84a9.jpg)
Verywell / Lara Antal
## What Does Fatigue Feel Like?
A 2019 report in the journal *Biological Research for Nursing* defines fatigue as an “overwhelming, debilitating, and sustained” exhaustion that makes it harder to carry out activities and function. Family physicians note that at least 20% of patients and up to 35% of adolescents report fatigue at least four days a week.
Men and women will describe fatigue differently. For example, men may say they are feeling tired, whereas [women may link their fatigue](https://www.verywellhealth.com/why-am-i-so-tired-and-have-no-energy-female-7749984) to anxiety or depression. People may also describe fatigue as feeling exhausted, weary, listless, or rundown.
People with fatigue often experience:
- Lack of motivation or the ability to start activities
- Getting tired easily
- Experiencing mental fatigue or problems with concentration or memory
Often, fatigue is a symptom with a gradual onset, meaning it comes on slowly and gets worse with time. Most people who experience fatigue may not be aware early on how much energy they are losing. They can only determine this when they try to compare their ability to perform tasks from one time frame to another.
Further, they may think fatigue is a common symptom—due to aging, being busy or overworked, not getting enough sleep, or a combination of all of these—and ignore the symptom.
Don't ignore fatigue or delay seeking out medical care to determine the source of your fatigue. Your healthcare provider can help you pinpoint the cause and improve your quality of life.
### Common Symptoms
Though fatigue is a symptom of an underlying condition, it can cause mental and physical symptoms, such as:
- Weakness
- Lack of energy
- Constant tiredness or exhaustion
- Lack of motivation
- Difficulty with concentration
- Trouble starting and completing tasks
### Additional Symptoms
Fatigue is generally not a lone symptom. With it usually come other symptoms that can help your healthcare provider to determine the cause or causes of your fatigue.
Additional symptoms that may accompany fatigue include:
- [Headache](https://www.verywellhealth.com/headache-from-lack-of-sleep-5218116)
- Dizziness
- Sore or aching muscles
- Muscle weakness
- Slowed reflexes
- Impaired judgment
- Moodiness and irritability
- Loss of appetite
- Impaired coordination (affecting activities such as driving)
- Weakened immune function
- Attention and memory issues
- Blurry vision
### Chronic Fatigue Syndrome
Fatigue is considered chronic when the feelings of exhaustion or lack of energy have lasted six or more months. Regardless of the cause, chronic fatigue will impact a person’s day-to-day functioning and quality of life.
A diagnosis of [chronic fatigue syndrome (CFS)](https://www.verywellhealth.com/understanding-chronic-fatigue-syndrome-4158459) is made if a person has experienced chronic and ongoing fatigue for six months or more with no known cause, that is not improved with sleep or rest, and that gets worse with physical or mental activity.
Symptoms of CFS can affect different parts of the body and may include unrefreshing sleep, weakness of muscles or joints, problems with memory and concentration, and headaches. Symptoms can be mild, moderate, or severe, and may come and go or last for weeks or months at a time. They can come on gradually or suddenly.
## Factors That Contribute to Fatigue
Many factors can cause fatigue. It's a possible symptom of most medical illnesses.
Chronic and severe fatigue can stem from medical issues, lifestyle choices, or stress (both work-related and emotional).
Normal fatigue—that is, fatigue that occurs from mental or physical exertion—is not unusual. However, normal fatigue can become abnormal if it becomes chronic (long-lasting) or severe.
### Medical
Medical causes of fatigue may cause unrelenting exhaustion with additional symptoms. There are a number of diseases that trigger fatigue. If you find yourself experiencing long periods of fatigue, talk to your healthcare provider to determine the root cause.
The medical causes of fatigue can be classified under broad disease categories. Some of these disease categories include:
- [**Metabolic/endocrine**](https://www.verywellhealth.com/what-do-hormones-do-8753246): Conditions such as anemia, diabetes, hormonal imbalances, or liver or kidney disease
- [**Infections**](https://www.verywellhealth.com/bacteria-8684504): Influenza, tuberculosis, or malaria
- **Cardiac (heart) and pulmonary (lungs)**: Congestive heart failure, chronic obstructive pulmonary disease (COPD), arrhythmias, and asthma
- **Sleep problems**: Sleep apnea, insomnia, and restless leg syndrome
- [**Vitamin deficiencies**](https://www.verywellhealth.com/vitamin-deficiency-3014720): Vitamin D deficiency, vitamin B12 deficiency, or iron deficiency
- **Other conditions**: [Cancers](https://www.verywellhealth.com/can-i-drink-energy-drinks-to-fight-cancer-fatigue-513983) and rheumatic/autoimmune diseases
- **Medications** you are taking to treat other health conditions may also cause fatigue. This can include anti-depressants and anti-anxiety medications, sedative medication, some blood pressure medications, chemotherapy, radiation therapy, and steroids.
### Lifestyle
Lifestyle causes include:
- **Sleep disturbances**: If you are not getting enough sleep, too much sleep, or waking up during the night, you may experience daytime fatigue.
- **Diet**: If you are eating a lot of high-carb, high-fat, or quick-fix foods, sugary foods and drinks, or caffeinated drinks, you are not providing your body enough fuel or nutrients to function at its best. Moreover, these foods may cause you to experience energy boosts that quickly wear off, leading to a "crash" and worsening fatigue.
- **Alcohol and drugs**: Alcohol is a depressant that will slow down the nervous system and disturb sleep. Cigarettes and caffeine will stimulate the nervous system and cause you trouble with falling asleep and staying asleep.
- **Lack of regular activity**: Physical activity is known for improving your health and well-being, reducing stress, and improving your energy levels. It will also help you sleep better and reduce daytime fatigue.
- **Individual factors**: Personal or family illness or injury, having too many commitments, and financial problems can cause a person to feel fatigued.
### Mental Health
A loss of energy may be related to mental health problems such as:
- [Depression](https://www.verywellhealth.com/what-are-the-physical-effects-of-sleep-deprivation-3015079)
- Anxiety
- Grief
These conditions exhaust the body physically and emotionally and cause severe fatigue to set in.
### Workplace-Related Fatigue
Night shift workers may experience daytime fatigue as it disrupts the body's natural circadian rhythm, which is designed for nighttime sleep.
Poor workplace practices that can also contribute to fatigue include:
- Irregular working hours
- Physical labor
- Long hours
- Noisy workplaces
- Fixed concentration
- Repetitive tasks
Fatigue may also be caused by the following workplace stressors:
- Heavy workload
- Conflict with bosses or coworkers
- Workplace bullying
- Threats to job security
## How Healthcare Providers Diagnose Fatigue
Fatigue presents with a range of symptoms and is often caused by several different factors working in combination. That makes finding a diagnosis more difficult. Therefore, your healthcare provider will try to determine what is causing fatigue using a number of tests, including the following:
**Medical history**: Your healthcare provider will ask about recent stressful (good and bad) events in your life, such as the birth of a child, surgery, work stress and family problems, or other symptoms you have experienced in addition to fatigue.
**Physical exam**: A physical exam will help your practitioner check for signs of disease. Your medical professional may also ask about your current diet and lifestyle.
**Testing**: Tests can include blood work, urine screens, X-rays, and other imaging. Your healthcare provider will want to rule out physical causes.
### When to See a Healthcare Provider
You should see your healthcare provider if your fatigue:
- Has come on suddenly and is not the result of normal short-term physical or mental stress
- Is not relieved by rest, sleep, or the removal of stressors
- Has become severe or chronic
- Is accompanied by other unexplained symptoms
- Associated with weakness, [fainting, or near fainting](https://www.verywellhealth.com/causes-of-fainting-1298399)
- Is accompanied by unexplained weight loss, masses or lumps anywhere on the body, [fever (greater than 101 degrees Fahrenheit)](https://www.verywellhealth.com/fever-8685009), abnormal bleeding, and/or unexplained pain anywhere in the body
### Signs of a Medical Emergency
Go to your local hospital emergency department if you experience the following symptoms, with or without fatigue:
- Fainting
- Chest pain
- Shortness of breath
- Bleeding (e.g., vomiting blood or rectal bleeding)
- Severe abdominal, pelvic, or back pain
- Severe headache
- Irregular or fast heart rate
## Effective Ways to Combat Fatigue
Treatment for fatigue depends on the causes. Some treatments for conditions that cause fatigue include medications, vitamins, diet, exercise, and avoiding unhealthy habits such as smoking, using drugs, or drinking alcohol in excess.
Fortunately, many of the causes of fatigue are treatable. For example, anemia can be treated with iron supplements, sleep apnea can be treated with medicine and CPAP machines, medications can maintain blood sugar and blood pressure, antibiotics can treat infections, and vitamins can regulate vitamin deficiencies.
There are also several things you can do to lessen fatigue caused by daily activity and boost energy levels and overall health. These include:
- Staying hydrated
- Eating healthy foods
- Exercising regularly
- Getting enough sleep
- Avoiding known stressors
- Avoiding over-demanding work and social schedules
- Practicing relaxation activities, such as yoga
You should also check with your healthcare provider for mental health issues like anxiety and depression.
Lifestyle changes help ease fatigue, but it is also important to follow your healthcare provider’s treatment plan for any diagnosed medical condition. Left untreated, fatigue can negatively affect your physical and mental health.
Read more:
- [Health A-Z](https://www.verywellhealth.com/health-a-z-4014770)
- [CFS & Fibromyalgia](https://www.verywellhealth.com/fibromyalgia-and-chronic-fatigue-4014724)
- [Symptoms](https://www.verywellhealth.com/fibromyalgia-and-chronic-fatigue-symptoms-4158463)
7 Sources
Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our [editorial process](https://www.verywellhealth.com/verywell-editorial-process-4777042) to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.
1. MedlinePlus. [Fatigue](https://medlineplus.gov/ency/article/003088.htm).
2. Matura LA, Malone S, Jamie-Lara R, et al. [A systematic review of biological mechanisms of fatigue in chronic illness](https://doi.org/10.1177/1099800418764326). *Biol Res Nurs.* 2018 Jul;20(4): 410–421. doi:10.1177/1099800418764326
3. Rothenthal TC, Majeroni BA, Pretorius R, et al. [Fatigue: an overview](https://www.aafp.org/pubs/afp/issues/2008/1115/p1173.html). *Am Fam Physician*; 78(10):1173-1179.
4. Office of Women’s Health. [Chronic fatigue syndrome](https://www.womenshealth.gov/a-z-topics/chronic-fatigue-syndrome).
5. Hui Ho D, Zheng R. [Approach to fatigue in primary care](https://doi.org/10.4103/SINGAPOREMEDJ.SMJ-2021-118). *Singapore Med J*. 2022;63(11):674. doi:10.4103/SINGAPOREMEDJ.SMJ-2021-118
6. Stadje R, Dorniden K, Becker A, et al. [The differential diagnosis of tiredness: a systematic review](https://doi.org/10.1186/s12875-016-0545-5). *BMC Fam Pract.* 2016;17:147. doi:10.1186/s12875-016-0545-5
7. Caldwell JA, Caldwell JL, Thompson LA, Lieberman HR. [Fatigue and its management in the workplace](https://doi.org/10.1016/j.neubiorev.2018.10.024). *Neuroscience & Biobehavioral Reviews*. 2019;96:272-289. doi:10.1016/j.neubiorev.2018.10.024
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By [Lana Barhum](https://www.verywellhealth.com/lana-barhum-4173343)
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| Readable Markdown | ### Key Takeaways
- Fatigue is a common symptom that can affect your physical and mental health and can often be resolved with rest or reduced activity.
- Many illnesses and lifestyle factors can cause fatigue, but strategies like getting enough sleep, exercising regularly, and eating a healthy diet may help to manage symptoms.
- Chronic fatigue lasts six months or more and impacts daily life, so it's important to talk to a healthcare provider.
Fatigue is a feeling of intense exhaustion and lack of motivation that doesn't simply disappear with a good night's rest. Many health conditions and lifestyle factors can cause fatigue, and the symptoms can be physical, psychological, or a combination of both. It's essential to determine the cause of your fatigue to receive effective treatment.
Verywell / Lara Antal
## What Does Fatigue Feel Like?
A 2019 report in the journal *Biological Research for Nursing* defines fatigue as an “overwhelming, debilitating, and sustained” exhaustion that makes it harder to carry out activities and function. Family physicians note that at least 20% of patients and up to 35% of adolescents report fatigue at least four days a week.
Men and women will describe fatigue differently. For example, men may say they are feeling tired, whereas [women may link their fatigue](https://www.verywellhealth.com/why-am-i-so-tired-and-have-no-energy-female-7749984) to anxiety or depression. People may also describe fatigue as feeling exhausted, weary, listless, or rundown.
People with fatigue often experience:
- Lack of motivation or the ability to start activities
- Getting tired easily
- Experiencing mental fatigue or problems with concentration or memory
Often, fatigue is a symptom with a gradual onset, meaning it comes on slowly and gets worse with time. Most people who experience fatigue may not be aware early on how much energy they are losing. They can only determine this when they try to compare their ability to perform tasks from one time frame to another.
Further, they may think fatigue is a common symptom—due to aging, being busy or overworked, not getting enough sleep, or a combination of all of these—and ignore the symptom.
Don't ignore fatigue or delay seeking out medical care to determine the source of your fatigue. Your healthcare provider can help you pinpoint the cause and improve your quality of life.
### Common Symptoms
Though fatigue is a symptom of an underlying condition, it can cause mental and physical symptoms, such as:
- Weakness
- Lack of energy
- Constant tiredness or exhaustion
- Lack of motivation
- Difficulty with concentration
- Trouble starting and completing tasks
### Additional Symptoms
Fatigue is generally not a lone symptom. With it usually come other symptoms that can help your healthcare provider to determine the cause or causes of your fatigue.
Additional symptoms that may accompany fatigue include:
- [Headache](https://www.verywellhealth.com/headache-from-lack-of-sleep-5218116)
- Dizziness
- Sore or aching muscles
- Muscle weakness
- Slowed reflexes
- Impaired judgment
- Moodiness and irritability
- Loss of appetite
- Impaired coordination (affecting activities such as driving)
- Weakened immune function
- Attention and memory issues
- Blurry vision
### Chronic Fatigue Syndrome
Fatigue is considered chronic when the feelings of exhaustion or lack of energy have lasted six or more months. Regardless of the cause, chronic fatigue will impact a person’s day-to-day functioning and quality of life.
A diagnosis of [chronic fatigue syndrome (CFS)](https://www.verywellhealth.com/understanding-chronic-fatigue-syndrome-4158459) is made if a person has experienced chronic and ongoing fatigue for six months or more with no known cause, that is not improved with sleep or rest, and that gets worse with physical or mental activity.
Symptoms of CFS can affect different parts of the body and may include unrefreshing sleep, weakness of muscles or joints, problems with memory and concentration, and headaches. Symptoms can be mild, moderate, or severe, and may come and go or last for weeks or months at a time. They can come on gradually or suddenly.
## Factors That Contribute to Fatigue
Many factors can cause fatigue. It's a possible symptom of most medical illnesses.
Chronic and severe fatigue can stem from medical issues, lifestyle choices, or stress (both work-related and emotional).
Normal fatigue—that is, fatigue that occurs from mental or physical exertion—is not unusual. However, normal fatigue can become abnormal if it becomes chronic (long-lasting) or severe.
### Medical
Medical causes of fatigue may cause unrelenting exhaustion with additional symptoms. There are a number of diseases that trigger fatigue. If you find yourself experiencing long periods of fatigue, talk to your healthcare provider to determine the root cause.
The medical causes of fatigue can be classified under broad disease categories. Some of these disease categories include:
- [**Metabolic/endocrine**](https://www.verywellhealth.com/what-do-hormones-do-8753246): Conditions such as anemia, diabetes, hormonal imbalances, or liver or kidney disease
- [**Infections**](https://www.verywellhealth.com/bacteria-8684504): Influenza, tuberculosis, or malaria
- **Cardiac (heart) and pulmonary (lungs)**: Congestive heart failure, chronic obstructive pulmonary disease (COPD), arrhythmias, and asthma
- **Sleep problems**: Sleep apnea, insomnia, and restless leg syndrome
- [**Vitamin deficiencies**](https://www.verywellhealth.com/vitamin-deficiency-3014720): Vitamin D deficiency, vitamin B12 deficiency, or iron deficiency
- **Other conditions**: [Cancers](https://www.verywellhealth.com/can-i-drink-energy-drinks-to-fight-cancer-fatigue-513983) and rheumatic/autoimmune diseases
- **Medications** you are taking to treat other health conditions may also cause fatigue. This can include anti-depressants and anti-anxiety medications, sedative medication, some blood pressure medications, chemotherapy, radiation therapy, and steroids.
### Lifestyle
Lifestyle causes include:
- **Sleep disturbances**: If you are not getting enough sleep, too much sleep, or waking up during the night, you may experience daytime fatigue.
- **Diet**: If you are eating a lot of high-carb, high-fat, or quick-fix foods, sugary foods and drinks, or caffeinated drinks, you are not providing your body enough fuel or nutrients to function at its best. Moreover, these foods may cause you to experience energy boosts that quickly wear off, leading to a "crash" and worsening fatigue.
- **Alcohol and drugs**: Alcohol is a depressant that will slow down the nervous system and disturb sleep. Cigarettes and caffeine will stimulate the nervous system and cause you trouble with falling asleep and staying asleep.
- **Lack of regular activity**: Physical activity is known for improving your health and well-being, reducing stress, and improving your energy levels. It will also help you sleep better and reduce daytime fatigue.
- **Individual factors**: Personal or family illness or injury, having too many commitments, and financial problems can cause a person to feel fatigued.
### Mental Health
A loss of energy may be related to mental health problems such as:
- [Depression](https://www.verywellhealth.com/what-are-the-physical-effects-of-sleep-deprivation-3015079)
- Anxiety
- Grief
These conditions exhaust the body physically and emotionally and cause severe fatigue to set in.
### Workplace-Related Fatigue
Night shift workers may experience daytime fatigue as it disrupts the body's natural circadian rhythm, which is designed for nighttime sleep.
Poor workplace practices that can also contribute to fatigue include:
- Irregular working hours
- Physical labor
- Long hours
- Noisy workplaces
- Fixed concentration
- Repetitive tasks
Fatigue may also be caused by the following workplace stressors:
- Heavy workload
- Conflict with bosses or coworkers
- Workplace bullying
- Threats to job security
## How Healthcare Providers Diagnose Fatigue
Fatigue presents with a range of symptoms and is often caused by several different factors working in combination. That makes finding a diagnosis more difficult. Therefore, your healthcare provider will try to determine what is causing fatigue using a number of tests, including the following:
**Medical history**: Your healthcare provider will ask about recent stressful (good and bad) events in your life, such as the birth of a child, surgery, work stress and family problems, or other symptoms you have experienced in addition to fatigue.
**Physical exam**: A physical exam will help your practitioner check for signs of disease. Your medical professional may also ask about your current diet and lifestyle.
**Testing**: Tests can include blood work, urine screens, X-rays, and other imaging. Your healthcare provider will want to rule out physical causes.
### When to See a Healthcare Provider
You should see your healthcare provider if your fatigue:
- Has come on suddenly and is not the result of normal short-term physical or mental stress
- Is not relieved by rest, sleep, or the removal of stressors
- Has become severe or chronic
- Is accompanied by other unexplained symptoms
- Associated with weakness, [fainting, or near fainting](https://www.verywellhealth.com/causes-of-fainting-1298399)
- Is accompanied by unexplained weight loss, masses or lumps anywhere on the body, [fever (greater than 101 degrees Fahrenheit)](https://www.verywellhealth.com/fever-8685009), abnormal bleeding, and/or unexplained pain anywhere in the body
### Signs of a Medical Emergency
Go to your local hospital emergency department if you experience the following symptoms, with or without fatigue:
- Fainting
- Chest pain
- Shortness of breath
- Bleeding (e.g., vomiting blood or rectal bleeding)
- Severe abdominal, pelvic, or back pain
- Severe headache
- Irregular or fast heart rate
## Effective Ways to Combat Fatigue
Treatment for fatigue depends on the causes. Some treatments for conditions that cause fatigue include medications, vitamins, diet, exercise, and avoiding unhealthy habits such as smoking, using drugs, or drinking alcohol in excess.
Fortunately, many of the causes of fatigue are treatable. For example, anemia can be treated with iron supplements, sleep apnea can be treated with medicine and CPAP machines, medications can maintain blood sugar and blood pressure, antibiotics can treat infections, and vitamins can regulate vitamin deficiencies.
There are also several things you can do to lessen fatigue caused by daily activity and boost energy levels and overall health. These include:
- Staying hydrated
- Eating healthy foods
- Exercising regularly
- Getting enough sleep
- Avoiding known stressors
- Avoiding over-demanding work and social schedules
- Practicing relaxation activities, such as yoga
You should also check with your healthcare provider for mental health issues like anxiety and depression.
Lifestyle changes help ease fatigue, but it is also important to follow your healthcare provider’s treatment plan for any diagnosed medical condition. Left untreated, fatigue can negatively affect your physical and mental health. |
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