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 of all ages (as of 2020).[4] Depression affects a person's thoughts, behavior, feelings, and sense of well-being.[5] Experiences that would normally bring a person pleasure or joy give reduced pleasure or joy, and the afflicted person often experiences a loss of motivation or interest in those activities.[6]
Depressed mood is a symptom of some mood disorders, also categorized and called depression, such as major depressive disorder, bipolar disorder and dysthymia;[7] it is a normal temporary reaction to life events, such as the loss of a loved one; and it is also a symptom of some physical diseases and a side effect of some drugs and medical treatments. It may feature sadness, difficulty in thinking and concentration, or a significant increase or decrease in appetite and time spent sleeping. People experiencing depression may have feelings of dejection or hopelessness, and may experience suicidal thoughts. Depression can either be short term or long term.