According to the National Institute of Mental Health, there are three major types of depression: major depression, dysthymia, and bipolar disorder.

Major Depression

This form of depression is disabling and directly interferes with a person’s ability to work, perform daily activities, and enjoy life. People who experience major depression often have emotional and behavioral symptoms, and may avoid going to work or being in public.

Dysthymia

This form of depression does not disable someone entirely, but generally impacts someone’s ability to feel good, engage in social activities, and perform daily activities. A person with this form of depression may still be able to function at work and in their home life without others being aware of a problem. 

Bipolar Disorder

Bipolar disorder causes severe mood swings, a state of mania (high), and a state of depression (low).

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