Below are some common types of depression:
This isn't a technical term in psychiatry. But you can have a depressed mood when you're having trouble managing a stressful event in your life, such as a death in your family, a divorce, or losing your job. Your doctor may call this "stress response syndrome."
Major Depression is having symptoms of depression most of the day, nearly every day for at least 2 weeks that interfere with your ability to work, sleep, study, eat, and enjoy life. An episode may occur only once in a person’s lifetime, but frequently a person has several occurrences. These may be years apart.
PERSISTENT DEPRESSIVE DISORDER
Persistent Depressive Disorder (dysthymia) is having symptoms of depression that last for at least 2 years. A person diagnosed with this form of depression may have episodes of major depression along with periods of less severe symptoms.
Bipolar disorder, also known as manic depression, is a mental illness that brings severe high and low moods and changes in sleep, energy, thinking, and behavior. People who have bipolar disorder can have periods in which they feel overly happy and energized and other periods of feeling very sad, hopeless, and sluggish. In between those periods, they usually feel normal.
PREMENSTRUAL DYSPHORIC DISORDER (PMDD)
PMDD is more severe than the symptoms experienced in PMS and requires medical treatment. Symptoms are most commonly experienced during the second half of the menstrual cycle. For some women, the symptoms of PMDD can last until menopause.
SEASONAL AFFECTIVE DISORDER
SAD is a type of depression that comes and goes with the seasons, typically starting in the late fall and early winter and going away during the spring and summer.
This type of depression occurs when a person has severe depression plus some form of psychosis, such as having disturbing false fixed beliefs (delusions) or hearing or seeing upsetting things that others cannot hear or see (hallucinations).