Dysthymia (pronounced /) is a chronic mood disorder that falls within the depression spectrum. It is considered a chronic depression, but with less severity than major depressive disorder. This disorder tends to be a chronic, long-lasting illness.Hersen, M., Turner, S. M., & Beidel, D. C. (Eds. ...

cyclothymia: a mild bipolar disorder that persists over a long time

Dysthymia as related to Cyclothymic disorder