Depression | |
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Lithograph of a person diagnosed with melancholia and strong suicidal tendency in 1892 | |
Specialty | Psychiatry, psychology |
Symptoms | Low mood, aversion to activity, loss of interest, loss of feeling pleasure |
Causes | Brain chemistry, genetics, life events, medical conditions, personality[1] |
Risk factors | Stigma of mental health disorder[2] |
Diagnostic method | Patient Health Questionnaire, Beck Depression Inventory |
Differential diagnosis | Anxiety, bipolar disorder, borderline personality disorder |
Prevention | Social connections, physical activity |
Treatment | Psychotherapy, psychopharmacology |
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Emotions |
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Depression is a mental state of low mood and aversion to activity.[3] It affects about 3.5% of the global population, or about 280 million people worldwide, as of 2020.[4] Depression affects a person's thoughts, behavior, feelings, and sense of well-being.[5] The pleasure or joy that a person gets from certain experiences is reduced, and the afflicted person often experiences a loss of motivation or interest in those activities.[6] People with depression may experience sadness, feelings of dejection or hopelessness, difficulty in thinking and concentration, or a significant change in appetite or time spent sleeping; suicidal thoughts can also be experienced.
Depression can have multiple, sometimes overlapping, origins. Depression can be a symptom of some mood disorders, some of which are also commonly called depression, such as major depressive disorder, bipolar disorder and dysthymia.[7] Additionally, depression can be a normal temporary reaction to life events, such as the loss of a loved one. Depression is also a symptom of some physical diseases and a side effect of some drugs and medical treatments.