OCD (Obsessive-Compulsive Disorder) involves persistent, unwanted thoughts (obsessions) and repetitive behaviors (compulsions) that disrupt daily life. Common themes include perfectionism, contamination, and harm. Exposure and Response Prevention (ERP) is a highly effective therapy for OCD. ERP gradually exposes individuals to their fears while preventing compulsive behaviors, helping them break the cycle of OCD and regain control over their lives.