What mood disorder involves a chronic state of mood disturbance?

Reviewed by Yoshinori Abe, MD

Internal Medicine

Dysthymic disorder, now called persistent depressive disorder (PDD), is a chronic mood disorder characterized by a long-lasting, low-grade depression that persists for two years or more in adults. Unlike major depression, symptoms are less severe but more enduring, often affecting daily functioning, energy, self-esteem, and overall quality of life.

Because PDD develops gradually, many people live with it for years without realizing their persistent low mood is a treatable medical condition. Recognizing the signs early is key to getting effective care and improving well-being. If you've been feeling "down" for longer than you can remember, don't guess—get clarity. Take a free, instant, online symptom check to better understand what your symptoms may mean and confidently navigate your next steps toward feeling better.

Reviewed for medical accuracy: 07/20/2026

Important Next Steps

Discover if chronic mood disturbances need care Learn likely causes of your mood symptoms Find out if it could be depression See OTC options for mood-related symptoms Find a doctor for mood disorders Discover medically valid home remedies for mood issues Understand if persistent mood changes need evaluation

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Explanation

Dysthymic disorder, now commonly referred to as persistent depressive disorder, is a mood disorder characterized by a chronic state of depression. Unlike major depressive disorder, which can have more severe episodes, dysthymic disorder involves a persistent low mood that lasts for at least two years.

Key Points:

Chronic Nature: The mood disturbance in dysthymic disorder is long-term, often lasting for years.
Symptoms: Individuals may experience feelings of sadness, low energy, and a lack of interest in daily activities.
Prevalence: It is common in primary care, suggesting that it affects a significant number of people.

For those experiencing symptoms of mood disorders, it is important to seek help from a healthcare provider. If you're unsure about your symptoms or want to better understand what you're experiencing, you can use a free AI symptom checker to get personalized insights based on your specific situation.

(References)

Grande I, Berk M, Birmaher B, & Vieta E. (2016). Bipolar disorder. Lancet (London, England), 26388529.
Steiner M, Bell B, Browne G, Roberts J, Gafni A, Byrne C, et al. (1999). Prevalence of dysthymic disorder in primary care. Journal of affective disorders, 10467975.
Riso LP, du Toit PL, Blandino JA, Penna S, Dacey S, Duin JS, et al. (2003). Cognitive aspects of chronic depression. Journal of abnormal psychology, 12653415.

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