Obsessive -Compulsive Disorder, or OCD, is characterized by unreasonable thoughts or fears that lead you to perform repetitive behaviors or rituals that interfere with your daily life. Many of these behaviors may be centered around a theme such as counting, checking, demanding reassurance and having things in order. 1 in 4 adults and 1 in 100 children suffer from OCD. In the U.S. the average age of adult onset is 19 years of age. You can tell you have OCD if you can't ignore your thoughts, and if you have repetitive behavior or rituals that you feel you have to do. Treatment for OCD involves both medication and behavioral therapy. You can get help by seeing your primary care physician who can then refer you to a mental health professional. Resources that can help people with OCD are local and online support groups, The International OCD Foundation, and many books and websites.