What causes dysthymic disorder?
No one knows for sure what causes dysthymia. It may be related to some changes in the brain that involve a chemical called serotonin (say: seer-uh-tone-in). Serotonin helps your brain handle emotions and make judgments. Other medical problems and ongoing life stress may also play a role.
Written by familydoctor.org editorial staff
Reviewed/Updated: 01/10
Created: 06/96