In severe or persistent cases, depression can reduce quality of life and cause disability.

Depression is often diagnosed in teens and adults, but it can affect anyone. Depression is diagnosed when symptoms like low mood and loss of interest or pleasure last at least two weeks.

Symptoms for major depressive disorder can be mild to severe and may include: – Difficulty concentrating. – Agitation or restlessness. – A loss of energy or fatigue. – Feeling sad, hopeless or despondent. --Sleep disturbances

– A loss of pleasure or interest in things you once enjoyed. – Recurrent thoughts of death or suicide. – Feelings of guilt or worthlessness.

Studies show that genetic, biological, environmental, and psychological factors can increase depression risk.

Types Persistent depressive disorder Perinatal or postpartum depression Psychotic depression Seasonal affective disorder. Depression occurring with bipolar disorder.

Experts advise those who suspect they or a loved one are depressed to seek professional help.

Other approaches, such as light therapy for SAD and exercise, may be recommended depending on the severity and type of depression.