|Other names||Psychiatric disorder, psychological disorder, mental illness, mental disease, mental breakdown, nervous breakdown, mental health conditions|
|Specialty||Psychiatry, clinical psychology|
|Symptoms||Agitation, anxiety, depression, mania, paranoia, psychosis|
|Complications||Cognitive impairment, social problems, suicide|
|Types||Anxiety disorders, eating disorders, mood disorders, personality disorders, psychotic disorders, substance use disorders|
|Causes||Genetic and environmental factors|
|Medication||Antidepressants, antipsychotics, anxiolytics, mood stabilizers, stimulants|
|Frequency||18% per year (United States)|
A mental disorder, also called a mental illness or psychiatric disorder, is a behavioral or mental pattern that causes significant distress or impairment of personal functioning. Such features may be persistent, relapsing and remitting, or occur as a single episode. Many disorders have been described, with signs and symptoms that vary widely between specific disorders. Such disorders may be diagnosed by a mental health professional.
The causes of mental disorders are often unclear. Theories may incorporate findings from a range of fields. Mental disorders are usually defined by a combination of how a person behaves, feels, perceives, or thinks. This may be associated with particular regions or functions of the brain, often in a social context. A mental disorder is one aspect of mental health. Cultural and religious beliefs, as well as social norms, should be taken into account when making a diagnosis.
Services are based in psychiatric hospitals or in the community, and assessments are carried out by mental health professionals such as psychiatrists, psychologists, psychiatric nurses and clinical social workers, using various methods such as psychometric tests but often relying on observation and questioning. Treatments are provided by various mental health professionals. Psychotherapy and psychiatric medication are two major treatment options. Other treatments include lifestyle changes, social interventions, peer support, and self-help. In a minority of cases, there might be involuntary detention or treatment. Prevention programs have been shown to reduce depression.
In 2019, common mental disorders around the globe include depression, which affects about 264 million, bipolar disorder, which affects about 45 million, dementia, which affects about 50 million, and schizophrenia and other psychoses, which affects about 20 million people. Developmental disorders include intellectual disability and pervasive developmental disorders which usually arise in infancy or childhood. Stigma and discrimination can add to the suffering and disability associated with mental disorders, leading to various social movements attempting to increase understanding and challenge social exclusion.
- "Mental illness – Symptoms and causes". Mayo Clinic. 8 June 2019. Retrieved 3 May 2020.
- "Any Mental Illness (AMI) Among U.S. Adults". National Institute of Mental Health. U.S. Department of Health and Human Services. Archived from the original on 7 April 2017. Retrieved 28 April 2017.
- "Mental Disorders". Medline Plus. U.S. National Library of Medicine. 15 September 2014. Archived from the original on 8 May 2016. Retrieved 10 June 2016.
- Bolton D (2008). What is Mental Disorder?: An Essay in Philosophy, Science, and Values. OUP Oxford. p. 6. ISBN 978-0-19-856592-5.
- "Mental disorders". World Health Organization. 9 April 2018. Archived from the original on 18 May 2015. Retrieved 2 February 2019.
- "Mental disorders". World Health Organization. Archived from the original on 29 March 2016. Retrieved 9 April 2016.
- "Mental disorders". World Health Organization. October 2014. Archived from the original on 18 May 2015. Retrieved 13 May 2015.
- American Psychiatric Association (2013). Diagnostic and Statistical Manual of Mental Disorders (5th ed.). Arlington, VA: American Psychiatric Publishing. pp. 101–05. ISBN 978-0-89042-555-8.
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- "Mental Disorders". World Health Organization. World Health Organization. Retrieved 20 July 2020.