OCSD is a term used to describe a family of related conditions. An explanation for why these disorders are related is complicated and not fully known, but often the conditions are linked because of common causes (e.g., genetic risk), physiology (e.g., brain regions, like the striatum), psychological experiences (e.g., intrusive thoughts or impulses), behaviors (e.g., repetitive movements), treatment response (e.g., exposure), and epidemiology (e.g., high co-occurrence rates).

OBSESSIVE-COMPULSIVE SPECTRUM DISORDERS

• Body Dysmorphic Disorder (and muscle dysmorphia)
• Hoarding and Clutter
• Hypochondriasis (and health-related anxiety)
• Obsessive-Compulsive Disorder
• Obsessive-Compulsive Personality Disorder
• Skin Picking (Excoriation Disorder) and other Habit Disorders
• Tourettes Syndrome and Tic Disorders
• Trichotillomania (hair pulling)