Depression is a common but serious mood disorder. It can affect emotions, thinking, and everyday activities such as eating, working, and sleeping. Depression can affect people of all ages, races, ethnicities, and genders. Women are diagnosed with depression more often than men, but men can also experience depression. Because men may be less likely to recognize, discuss, or seek help for emotional problems, their symptoms may go undiagnosed or undertreated. Depression can take several forms, including:
- Major depression: A depressed mood or loss of interest that occurs most of the time for at least two weeks and interferes with daily activities.
- Persistent depressive disorder: A form of depression with symptoms that may be less severe but last much longer, usually for at least two years.
- Perinatal depression: Depression that develops during pregnancy (prenatal depression) or after childbirth (postpartum depression).
- Seasonal affective disorder: Depression that follows a seasonal pattern. Symptoms often begin in winter and improve during spring and summer.
- Depression with symptoms of psychosis: A severe form of depression that may involve psychosis symptoms, such as delusions (false beliefs) or hallucinations (seeing or hearing things that are not present).
- Bipolar disorder: A condition involving episodes of depression and episodes of unusually elevated or irritable mood and increased activity. It is distinct from depressive disorders and requires professional assessment.
- Disruptive mood dysregulation disorder: A condition in children or adolescents involving ongoing irritability, anger, and frequent, intense temper outbursts.
- Premenstrual dysphoric disorder (PMDD): A condition similar to premenstrual syndrome (PMS) but more severe, which may cause significant irritability, depression, or anxiety in the week or two before a period.
Causes: Depression may develop following major negative life changes, trauma, or stress, and may sometimes be associated with side effects of certain medicines, including some hormonal medications. Research suggests that genetic, biological, environmental, and psychological factors can also play a role.
Depression, especially in middle age or later life, can occur alongside other serious medical conditions, including diabetes, cancer, heart disease, chronic pain, and Parkinson’s disease.
Symptoms: Symptoms may include a persistent sad, anxious, or “empty” mood; increased anger or irritability; hopelessness or pessimism; frustration or restlessness; feelings of guilt, worthlessness, or helplessness; loss of interest or pleasure in hobbies and activities; difficulty concentrating, remembering, or making decisions; difficulty sleeping, waking too early, or sleeping too much; changes in sexual desire or performance; unexplained aches, headaches, cramps, or digestive problems; and withdrawing from family and friends. Some people may also experience thoughts of death or suicide. Seek immediate help if there is a risk of self-harm.