Depression is a mood disorder that causes a persistent feeling of sadness and loss of interest in things and activities you previously enjoyed. It can also cause difficulties with thinking, remembering, eating, and sleeping.

It's normal to feel sad or upset about difficult life situations, such as a job loss or a divorce. But depression is different because it persists almost every day for at least two weeks and involves symptoms other than sadness.

There are several types of depressive disorders. Clinical depression psychotherapy, or major depressive disorder, is often called simply "depression." It is the most serious type of depression