ℹ️ Skipped - page is already crawled
| Filter | Status | Condition | Details |
|---|---|---|---|
| HTTP status | PASS | download_http_code = 200 | HTTP 200 |
| Age cutoff | PASS | download_stamp > now() - 6 MONTH | 0.6 months ago |
| History drop | PASS | isNull(history_drop_reason) | No drop reason |
| Spam/ban | PASS | fh_dont_index != 1 AND ml_spam_score = 0 | ml_spam_score=0 |
| Canonical | PASS | meta_canonical IS NULL OR = '' OR = src_unparsed | Not set |
| Property | Value |
|---|---|
| URL | https://www.webmd.com/mental-health/mental-health-types-illness |
| Last Crawled | 2026-03-27 14:55:22 (18 days ago) |
| First Indexed | not set |
| HTTP Status Code | 200 |
| Meta Title | Mental Health: Types of Mental Illness |
| Meta Description | Learn more from WebMD about the different types of mental illness. |
| Meta Canonical | null |
| Boilerpipe Text | 4 min read
There are many different conditions that are recognized as mental illnesses. The more common types include:
Anxiety disorders:
People with anxiety disorders respond to certain objects or situations with fear and dread, as well as with physical signs of anxiety or panic, such as a rapid heartbeat and sweating. An anxiety disorder is diagnosed if the person's response is not appropriate for the situation, if the person cannot control the response, or if the anxiety interferes with normal functioning. Anxiety disorders include generalized anxiety disorder, panic disorder, social anxiety disorder, and specific phobias.
Mood disorders:
These disorders, also called affective disorders, involve persistent feelings of sadness or periods of feeling overly happy, or fluctuations from extreme happiness to extreme sadness. The most common mood disorders are depression, bipolar disorder, and cyclothymic disorder.
Psychotic disorders:
Psychotic disorders involve distorted awareness and thinking. Two of the most common symptoms of psychotic disorders are
hallucinations
-- the experience of images or sounds that are not real, such as hearing voices -- and delusions, which are false fixed beliefs that the ill person accepts as true, despite evidence to the contrary. Schizophrenia is an example of a psychotic disorder.
Eating disorders:
Eating disorders involve extreme emotions, attitudes, and behaviors involving weight and food. Anorexia nervosa, bulimia nervosa, and binge eating disorder are the most common
eating disorders
.
Impulse control and addiction disorders:
People with impulse control disorders are unable to resist urges, or impulses, to perform acts that could be harmful to themselves or others. Pyromania (starting fires), kleptomania (stealing), and compulsive gambling are examples of impulse control disorders. Alcohol and drugs are common objects of addictions. Often, people with these disorders become so involved with the objects of their addiction that they begin to ignore responsibilities and relationships.
Personality disorders:
People with personality disorders have extreme and inflexible personality traits that are distressing to the person and/or cause problems in work, school, or social relationships. In addition, the person's patterns of thinking and behavior significantly differ from the expectations of society and are so rigid that they interfere with the person's normal functioning. Examples include antisocial personality disorder, obsessive-compulsive personality disorder, histrionic personality disorder, schizoid personality disorder,
and
paranoid personality disorder
.
Obsessive-compulsive disorder (OCD)
: People with OCD are plagued by constant thoughts or fears that cause them to perform certain rituals or routines. The disturbing thoughts are called obsessions, and the rituals are called compulsions. An example is a person with an unreasonable fear of germs who constantly washes their hands.
Post-traumatic stress disorder (
PTSD
)
: PTSD is a condition that can develop following a traumatic and/or terrifying event, such as a sexual or physical assault, the unexpected death of a loved one, or a natural disaster. People with PTSD often have lasting and frightening thoughts and memories of the event, and tend to be emotionally numb.
Other, less common types of mental illnesses include:
Stress response syndromes (formerly called adjustment disorders):
Stress response syndromes occur when a person develops emotional or behavioral symptoms in response to a
stressful
event or situation. The stressors may include natural disasters, such as an earthquake or tornado; events or crises, such as a car accident or the diagnosis of a major illness; or interpersonal problems, such as a divorce, death of a loved one, loss of a job, or a problem with substance abuse. Stress response syndromes usually begin within three months of the event or situation and ends within six months after the stressor stops or is eliminated.
Dissociative disorders:
People with these disorders suffer severe disturbances or changes in memory, consciousness, identity, and general awareness of themselves and their surroundings. These disorders usually are associated with overwhelming stress, which may be the result of traumatic events, accidents, or disasters that may be experienced or witnessed by the individual. Dissociative identity disorder, formerly called
multiple personality disorder
, or "split personality," and depersonalization disorder are examples of dissociative disorders.
Factitious disorders:
Factitious disorders are conditions in which a person knowingly and intentionally creates or complains of physical and/or emotional symptoms in order to place the individual in the role of a patient or a person in need of help.
Sexual and gender disorders:
These include disorders that affect sexual desire, performance, and behavior. Sexual dysfunction, gender identity disorder, and the paraphilias are examples of sexual and gender disorders.
Somatic symptom disorders:
A person with a somatic symptom disorder, formerly known as a psychosomatic disorder or
somatoform disorder
, experiences physical symptoms of an illness or of pain with an excessive and disproportionate level of distress, regardless of whether or not a doctor can find a medical cause for the symptoms.
Tic disorders:
People with tic disorders make sounds or display nonpurposeful body movements that are repeated, quick, sudden, and/or uncontrollable. (Sounds that are made involuntarily are called vocal tics.)
Tourette's syndrome
is an example of a tic disorder.
Other diseases or conditions, including various sleep-related problems and many forms of dementia, including Alzheimer's disease, are sometimes classified as mental illnesses, because they involve the brain. |
| Markdown | [Skip to main content](https://www.webmd.com/mental-health/mental-health-types-illness#main-container)
[](https://www.webmd.com/)
- [Home](https://www.webmd.com/)
- [Conditions]()
Back
Conditions[ View All](https://www.webmd.com/a-to-z-guides/health-topics)
- [ADD/ADHD](https://www.webmd.com/add-adhd/default.htm)
- [Allergies](https://www.webmd.com/allergies/default.htm)
- [Arthritis](https://www.webmd.com/arthritis/default.htm)
- [Atrial fibrillation](https://www.webmd.com/heart-disease/atrial-fibrillation/default.htm)
- [Breast Cancer](https://www.webmd.com/breast-cancer/default.htm)
- [Cancer](https://www.webmd.com/cancer/default.htm)
- [Crohn's Disease](https://www.webmd.com/ibd-crohns-disease/crohns-disease/default.htm)
- [Depression](https://www.webmd.com/depression/default.htm)
- [Diabetes](https://www.webmd.com/diabetes/default.htm)
- [DVT](https://www.webmd.com/dvt/default.htm)
- [Eczema](https://www.webmd.com/skin-problems-and-treatments/eczema/default.htm)
- [Eye Health](https://www.webmd.com/eye-health/default.htm)
- [Heart Disease](https://www.webmd.com/heart-disease/default.htm)
- [HIV & AIDS](https://www.webmd.com/hiv-aids/default.htm)
- [Hypertension](https://www.webmd.com/hypertension-high-blood-pressure/default.htm)
- [Lung Disease](https://www.webmd.com/lung/default.htm)
- [Lupus](https://www.webmd.com/lupus/default.htm)
- [Mental Health](https://www.webmd.com/mental-health/default.htm)
- [Multiple Sclerosis](https://www.webmd.com/multiple-sclerosis/default.htm)
- [Migraine](https://www.webmd.com/migraines-headaches/default.htm)
- [Pain Management](https://www.webmd.com/pain-management/default.htm)
- [Psoriasis](https://www.webmd.com/skin-problems-and-treatments/psoriasis/default.htm)
- [Psoriatic Arthritis](https://www.webmd.com/arthritis/psoriatic-arthritis/default.htm)
- [Rheumatoid Arthritis](https://www.webmd.com/rheumatoid-arthritis/default.htm)
- [Sexual Conditions](https://www.webmd.com/sexual-conditions/default.htm)
- [Skin Problems](https://www.webmd.com/skin-problems-and-treatments/default.htm)
- [Sleep Disorders](https://www.webmd.com/sleep-disorders/default.htm)
- [Ulcerative Colitis](https://www.webmd.com/ibd-crohns-disease/ulcerative-colitis/default.htm)
- [ View All](https://www.webmd.com/a-to-z-guides/health-topics)
- [Drugs & Supplements]()
Back
Drugs & Supplements
- [Drugs](https://www.webmd.com/drugs/2/index)
- [Supplements](https://www.webmd.com/vitamins/index)
- [Pill Identifier](https://www.webmd.com/pill-identification/default.htm)
- [Interaction Checker](https://www.webmd.com/interaction-checker/default.htm)
- [Pet Medications](https://www.webmd.com/pets/pet-meds)
- [Well-Being]()
Back
Well-Being
- [Aging Well](https://www.webmd.com/healthy-aging/default.htm)
- [Baby](https://www.webmd.com/parenting/baby/default.htm)
- [Birth Control](https://www.webmd.com/sex/birth-control/default.htm)
- [Children's Health](https://www.webmd.com/children/default.htm)
- [Diet & Weight Management](https://www.webmd.com/diet/default.htm)
- [Fitness & Exercise](https://www.webmd.com/fitness-exercise/default.htm)
- [Food & Recipes](https://www.webmd.com/food-recipes/default.htm)
- [Health & Balance](https://www.webmd.com/balance/default.htm)
- [Healthy Beauty](https://www.webmd.com/beauty/default.htm)
- [Men's Health](https://www.webmd.com/men/default.htm)
- [Parenting](https://www.webmd.com/parenting/default.htm)
- [Pet Health](https://www.webmd.com/pets/default.htm)
- [Pregnancy](https://www.webmd.com/baby/default.htm)
- [Sex & Relationships](https://www.webmd.com/sex-relationships/default.htm)
- [Teen Health](https://www.webmd.com/teens/default.htm)
- [Women's Health](https://www.webmd.com/women/default.htm)
- [Symptom Checker](https://symptoms.webmd.com/default.htm)
- [Find a Doctor](https://doctor.webmd.com/)
- [More]()
Back
More
- [News](https://www.webmd.com/news/default.htm)
- [Blogs](https://blogs.webmd.com/default.htm)
- [Podcasts](https://www.webmd.com/podcasts/default.htm)
- [Webinars](https://www.webmd.com/webinar/default.htm)
- [Newsletters](https://www.webmd.com/newsletters)
- [Videos](https://www.webmd.com/a-to-z-guides/videos)
- [WebMD Surveys](https://surveys.webmd.com/survey/lu3n6U0tmKKU?eid=webmdheader)
- [WebMD Magazine](https://www.webmd.com/magazine/default.htm)
- [Best Hospitals](https://doctor.webmd.com/choice-awards)
- [Support Groups](https://www.webmd.com/facebook-groups)
- [Privacy & More]()
Subscribe
[Log In](https://member.webmd.com/signin?appid=1&returl=https://www.webmd.com/mental-health/mental-health-types-illness)
Subscribe
- [Mental Health](https://www.webmd.com/mental-health/default.htm)/
- [Reference](https://www.webmd.com/mental-health/medical-reference/default.htm)/
# Types of Mental Illness
Written by [WebMD Editorial Contributors](https://www.webmd.com/webmd-editorial-contributors)
Medically Reviewed by [Smitha Bhandari, MD](https://www.webmd.com/bio/smitha-bhandari) on April 13, 2025
4 min read
There are many different conditions that are recognized as mental illnesses. The more common types include:
- **Anxiety disorders:** People with anxiety disorders respond to certain objects or situations with fear and dread, as well as with physical signs of anxiety or panic, such as a rapid heartbeat and sweating. An anxiety disorder is diagnosed if the person's response is not appropriate for the situation, if the person cannot control the response, or if the anxiety interferes with normal functioning. Anxiety disorders include generalized anxiety disorder, panic disorder, social anxiety disorder, and specific phobias.
- **Mood disorders:** These disorders, also called affective disorders, involve persistent feelings of sadness or periods of feeling overly happy, or fluctuations from extreme happiness to extreme sadness. The most common mood disorders are depression, bipolar disorder, and cyclothymic disorder.
- **Psychotic disorders:** Psychotic disorders involve distorted awareness and thinking. Two of the most common symptoms of psychotic disorders are [hallucinations](https://www.webmd.com/schizophrenia/what-are-hallucinations) -- the experience of images or sounds that are not real, such as hearing voices -- and delusions, which are false fixed beliefs that the ill person accepts as true, despite evidence to the contrary. Schizophrenia is an example of a psychotic disorder.
- **Eating disorders:** Eating disorders involve extreme emotions, attitudes, and behaviors involving weight and food. Anorexia nervosa, bulimia nervosa, and binge eating disorder are the most common [eating disorders](https://www.webmd.com/mental-health/eating-disorders/video/cm/teen-eating-disorders).
- **Impulse control and addiction disorders:** People with impulse control disorders are unable to resist urges, or impulses, to perform acts that could be harmful to themselves or others. Pyromania (starting fires), kleptomania (stealing), and compulsive gambling are examples of impulse control disorders. Alcohol and drugs are common objects of addictions. Often, people with these disorders become so involved with the objects of their addiction that they begin to ignore responsibilities and relationships.
- **Personality disorders:** People with personality disorders have extreme and inflexible personality traits that are distressing to the person and/or cause problems in work, school, or social relationships. In addition, the person's patterns of thinking and behavior significantly differ from the expectations of society and are so rigid that they interfere with the person's normal functioning. Examples include antisocial personality disorder, obsessive-compulsive personality disorder, histrionic personality disorder, schizoid personality disorder,and [paranoid personality disorder](https://www.webmd.com/mental-health/paranoid-personality-disorder).
- **Obsessive-compulsive disorder (OCD)**: People with OCD are plagued by constant thoughts or fears that cause them to perform certain rituals or routines. The disturbing thoughts are called obsessions, and the rituals are called compulsions. An example is a person with an unreasonable fear of germs who constantly washes their hands.
- **Post-traumatic stress disorder (**[**PTSD**](https://www.webmd.com/mental-health/post-traumatic-stress-disorder)**)**: PTSD is a condition that can develop following a traumatic and/or terrifying event, such as a sexual or physical assault, the unexpected death of a loved one, or a natural disaster. People with PTSD often have lasting and frightening thoughts and memories of the event, and tend to be emotionally numb.
Other, less common types of mental illnesses include:
- **Stress response syndromes (formerly called adjustment disorders):** Stress response syndromes occur when a person develops emotional or behavioral symptoms in response to a [stressful](https://www.webmd.com/balance/stress-management/what-is-stress) event or situation. The stressors may include natural disasters, such as an earthquake or tornado; events or crises, such as a car accident or the diagnosis of a major illness; or interpersonal problems, such as a divorce, death of a loved one, loss of a job, or a problem with substance abuse. Stress response syndromes usually begin within three months of the event or situation and ends within six months after the stressor stops or is eliminated.
- **Dissociative disorders:** People with these disorders suffer severe disturbances or changes in memory, consciousness, identity, and general awareness of themselves and their surroundings. These disorders usually are associated with overwhelming stress, which may be the result of traumatic events, accidents, or disasters that may be experienced or witnessed by the individual. Dissociative identity disorder, formerly called [multiple personality disorder](https://www.webmd.com/mental-health/dissociative-identity-disorder-multiple-personality-disorder), or "split personality," and depersonalization disorder are examples of dissociative disorders.
- **Factitious disorders:** Factitious disorders are conditions in which a person knowingly and intentionally creates or complains of physical and/or emotional symptoms in order to place the individual in the role of a patient or a person in need of help.
- **Sexual and gender disorders:** These include disorders that affect sexual desire, performance, and behavior. Sexual dysfunction, gender identity disorder, and the paraphilias are examples of sexual and gender disorders.
- **Somatic symptom disorders:** A person with a somatic symptom disorder, formerly known as a psychosomatic disorder or [somatoform disorder](https://www.webmd.com/mental-health/somatoform-disorders-symptoms-types-treatment), experiences physical symptoms of an illness or of pain with an excessive and disproportionate level of distress, regardless of whether or not a doctor can find a medical cause for the symptoms.
- **Tic disorders:** People with tic disorders make sounds or display nonpurposeful body movements that are repeated, quick, sudden, and/or uncontrollable. (Sounds that are made involuntarily are called vocal tics.) [Tourette's syndrome](https://www.webmd.com/brain/tourettes-syndrome) is an example of a tic disorder.
Other diseases or conditions, including various sleep-related problems and many forms of dementia, including Alzheimer's disease, are sometimes classified as mental illnesses, because they involve the brain.
Sources
Update History
Share
Print
Save
SOURCES:
American Psychological Association.
American Academy of Child & Adolescent Psychiatry.
[View privacy policy, copyright and trust info](https://www.webmd.com/about-webmd-policies/about-privacy-policy)
Share
Print
Save
[View privacy policy, copyright and trust info](https://www.webmd.com/about-webmd-policies/about-privacy-policy)
### More on Mental Health
[Understanding Different Types of Mental Illness](https://www.webmd.com/mental-health/mental-health-types-illness)
[Signs You’re Mentally Exhausted](https://www.webmd.com/mental-health/ss/slideshow-signs-youre-mentally-exhausted)
[Gaslighting: What It Is and How to Stop It](https://www.webmd.com/mental-health/ss/slideshow-gaslighting-what-it-is-and-how-to-stop-it)
Recommended
### Related Links
- [Mental Health News](https://www.webmd.com/mental-health/news-features)
- [Mental Health Reference](https://www.webmd.com/mental-health/medical-reference/default.htm)
- [Mental Health Slideshows](https://www.webmd.com/mental-health/ss/default.htm)
- [Mental Health Videos](https://www.webmd.com/mental-health/video/default.htm)
- [Mental Health Quizzes](https://www.webmd.com/mental-health/quiz/default.htm)
- [Mental Health Blogs](https://blogs.webmd.com/mental-health/default.htm)
- [Mental Health Medications](https://www.webmd.com/drugs/2/condition-952/major-depressive-disorder)
- [Find a Psychiatrist](https://doctor.webmd.com/providers/specialty/psychiatry)
- [ADHD](https://www.webmd.com/add-adhd/adhd-adults)
- [Anxiety/Panic Disorders](https://www.webmd.com/anxiety-panic/anxiety-disorders)
- [Bipolar Disorder](https://www.webmd.com/bipolar-disorder/mental-health-bipolar-disorder)
- [Crisis Assistance](https://www.webmd.com/first-aid/cm/crisis-resources)
- [Depression](https://www.webmd.com/depression/what-is-depression)
- [Eating Disorders](https://www.webmd.com/mental-health/eating-disorders/signs-of-eating-disorders)
- [Health & Balance](https://www.webmd.com/balance/default.htm)
- [Personality Disorders](https://www.webmd.com/mental-health/features/common-personality-disorders)
- [PTSD](https://www.webmd.com/mental-health/what-are-treatments-for-posttraumatic-stress-disorder)
- [Schizophrenia](https://www.webmd.com/schizophrenia/mental-health-schizophrenia)
- [Social Media and Mental Health](https://www.webmd.com/healthy-aging/features/tech-affects-relationships)
- [Stress Management](https://www.webmd.com/balance/all-stressed-out)
- [Substance Abuse & Addiction](https://www.webmd.com/mental-health/addiction/substance-abuse)
### Sign up for our free Emotional Wellness Newsletter
#### Get the latest updates on mental and emotional health
Subscribe
## Thanks for subscribing\!
###
By clicking Subscribe, I agree to the WebMD [Terms & Conditions](https://www.webmd.com/about-webmd-policies/about-terms-and-conditions-of-use) & [Privacy Policy](https://www.webmd.com/about-webmd-policies/about-privacy-policy) and understand that I may opt out of WebMD subscriptions at any time. This site is protected by reCAPTCHA and the Google [Privacy Policy](https://policies.google.com/privacy) and [Terms of Service](https://policies.google.com/terms) apply.
### Follow WebMD on Social Media
### Download WebMD App
[](https://taps.io/Bzg3Q)[](https://taps.io/Bzg2w)
[Policies]()
[About]()
[For Advertisers]()
- [Privacy Policy](https://www.webmd.com/about-webmd-policies/about-privacy-policy)
- [Cookie Policy](https://www.webmd.com/about-webmd-policies/cookie-policy)
- [Editorial Policy](https://www.webmd.com/about-webmd-policies/about-editorial-policy)
- [Advertising Policy](https://www.webmd.com/about-webmd-policies/about-advertising-policy)
- [Correction Policy](https://www.webmd.com/about-webmd-policies/webmd-corrections-policies)
- [Terms of Use](https://www.webmd.com/about-webmd-policies/about-terms-and-conditions-of-use)
- [Accessibility Statement](https://www.webmd.com/about-webmd-policies/accessibility-statement)
- [](https://privacy.truste.com/privacy-seal/validation?rid=07326333-3522-463d-81bf-f00fd7171fff)
- 
- 
© 2005 - 2026 WebMD LLC, an [Internet Brands](https://www.internetbrands.com/) company. All rights reserved. WebMD does not provide medical advice, diagnosis or treatment. [See additional information.](https://www.webmd.com/about-webmd-policies/additional-info)
[](https://www.webmd.com/) |
| Readable Markdown | 
4 min read
There are many different conditions that are recognized as mental illnesses. The more common types include:
- **Anxiety disorders:** People with anxiety disorders respond to certain objects or situations with fear and dread, as well as with physical signs of anxiety or panic, such as a rapid heartbeat and sweating. An anxiety disorder is diagnosed if the person's response is not appropriate for the situation, if the person cannot control the response, or if the anxiety interferes with normal functioning. Anxiety disorders include generalized anxiety disorder, panic disorder, social anxiety disorder, and specific phobias.
- **Mood disorders:** These disorders, also called affective disorders, involve persistent feelings of sadness or periods of feeling overly happy, or fluctuations from extreme happiness to extreme sadness. The most common mood disorders are depression, bipolar disorder, and cyclothymic disorder.
- **Psychotic disorders:** Psychotic disorders involve distorted awareness and thinking. Two of the most common symptoms of psychotic disorders are [hallucinations](https://www.webmd.com/schizophrenia/what-are-hallucinations) -- the experience of images or sounds that are not real, such as hearing voices -- and delusions, which are false fixed beliefs that the ill person accepts as true, despite evidence to the contrary. Schizophrenia is an example of a psychotic disorder.
- **Eating disorders:** Eating disorders involve extreme emotions, attitudes, and behaviors involving weight and food. Anorexia nervosa, bulimia nervosa, and binge eating disorder are the most common [eating disorders](https://www.webmd.com/mental-health/eating-disorders/video/cm/teen-eating-disorders).
- **Impulse control and addiction disorders:** People with impulse control disorders are unable to resist urges, or impulses, to perform acts that could be harmful to themselves or others. Pyromania (starting fires), kleptomania (stealing), and compulsive gambling are examples of impulse control disorders. Alcohol and drugs are common objects of addictions. Often, people with these disorders become so involved with the objects of their addiction that they begin to ignore responsibilities and relationships.
- **Personality disorders:** People with personality disorders have extreme and inflexible personality traits that are distressing to the person and/or cause problems in work, school, or social relationships. In addition, the person's patterns of thinking and behavior significantly differ from the expectations of society and are so rigid that they interfere with the person's normal functioning. Examples include antisocial personality disorder, obsessive-compulsive personality disorder, histrionic personality disorder, schizoid personality disorder,and [paranoid personality disorder](https://www.webmd.com/mental-health/paranoid-personality-disorder).
- **Obsessive-compulsive disorder (OCD)**: People with OCD are plagued by constant thoughts or fears that cause them to perform certain rituals or routines. The disturbing thoughts are called obsessions, and the rituals are called compulsions. An example is a person with an unreasonable fear of germs who constantly washes their hands.
- **Post-traumatic stress disorder (**[**PTSD**](https://www.webmd.com/mental-health/post-traumatic-stress-disorder)**)**: PTSD is a condition that can develop following a traumatic and/or terrifying event, such as a sexual or physical assault, the unexpected death of a loved one, or a natural disaster. People with PTSD often have lasting and frightening thoughts and memories of the event, and tend to be emotionally numb.
Other, less common types of mental illnesses include:
- **Stress response syndromes (formerly called adjustment disorders):** Stress response syndromes occur when a person develops emotional or behavioral symptoms in response to a [stressful](https://www.webmd.com/balance/stress-management/what-is-stress) event or situation. The stressors may include natural disasters, such as an earthquake or tornado; events or crises, such as a car accident or the diagnosis of a major illness; or interpersonal problems, such as a divorce, death of a loved one, loss of a job, or a problem with substance abuse. Stress response syndromes usually begin within three months of the event or situation and ends within six months after the stressor stops or is eliminated.
- **Dissociative disorders:** People with these disorders suffer severe disturbances or changes in memory, consciousness, identity, and general awareness of themselves and their surroundings. These disorders usually are associated with overwhelming stress, which may be the result of traumatic events, accidents, or disasters that may be experienced or witnessed by the individual. Dissociative identity disorder, formerly called [multiple personality disorder](https://www.webmd.com/mental-health/dissociative-identity-disorder-multiple-personality-disorder), or "split personality," and depersonalization disorder are examples of dissociative disorders.
- **Factitious disorders:** Factitious disorders are conditions in which a person knowingly and intentionally creates or complains of physical and/or emotional symptoms in order to place the individual in the role of a patient or a person in need of help.
- **Sexual and gender disorders:** These include disorders that affect sexual desire, performance, and behavior. Sexual dysfunction, gender identity disorder, and the paraphilias are examples of sexual and gender disorders.
- **Somatic symptom disorders:** A person with a somatic symptom disorder, formerly known as a psychosomatic disorder or [somatoform disorder](https://www.webmd.com/mental-health/somatoform-disorders-symptoms-types-treatment), experiences physical symptoms of an illness or of pain with an excessive and disproportionate level of distress, regardless of whether or not a doctor can find a medical cause for the symptoms.
- **Tic disorders:** People with tic disorders make sounds or display nonpurposeful body movements that are repeated, quick, sudden, and/or uncontrollable. (Sounds that are made involuntarily are called vocal tics.) [Tourette's syndrome](https://www.webmd.com/brain/tourettes-syndrome) is an example of a tic disorder.
Other diseases or conditions, including various sleep-related problems and many forms of dementia, including Alzheimer's disease, are sometimes classified as mental illnesses, because they involve the brain. |
| Shard | 142 (laksa) |
| Root Hash | 18365360746078618142 |
| Unparsed URL | com,webmd!www,/mental-health/mental-health-types-illness s443 |