Dysthymia, or persistent depressive disorder, is a chronic form of depression that lasts for at least two years in adults and one year in children. Common symptoms include feelings of negativity, low self-esteem, and changes in appetite and sleep patterns. Approximately 3-6% of Americans experience dysthymia at some point. Women and African Americans have higher rates than other groups. Causes may include genetic, biological, environmental, and psychological factors. Treatment options include yoga therapy, which can help regulate mood and reduce stress through gentle stretching, breathing, and meditation exercises.