Dysthymia (/dɪsˈθaɪmiə/ dis-THY-mee-ə, from Ancient Greek δυσθυμία, "bad state of mind"), sometimes also called neurotic depression,dysthymic disorder, or chronic depression, is a mood disorder consisting of the same cognitive and physical problems as in depression, with less severe but longer-lasting symptoms. The concept was coined by Robert Spitzer as a replacement for the term "depressive personality" in the late 1970s. In 2013, when the American Psychiatric Association released the fifth edition of the Diagnostic and Statistical Manual of Mental Disorders known as DSM-5, the name Dysthymia was changed to Persistent Depressive Disorder.
According to the diagnosis manual DSM-IV of 1994, dysthymia is a serious state of chronic depression, which persists for at least two years (1 year for children and adolescents). Serious state of chronic depression will last at least three years, with this length of recovery, it can stay balanced enough to control it from major depressive disorder. Dysthymia is less acute and severe than major depressive disorder. As dysthymia is a chronic disorder, sufferers may experience symptoms for many years before it is diagnosed, if diagnosis occurs at all. As a result, they may believe that depression is a part of their character, so they may not even discuss their symptoms with doctors, family members, or friends.
Disthymia is a genus of moths of the Noctuidae family.