Obsessive compulsive disorder (OCD) has been a hidden epidemic. A federally funded study found that 1.3% of people interviewed at that time had experienced obsessive compulsive symptoms in the previous month and 2.5% had had the disorder sometime in their lives. While the severity of cases varies, at its worst the sufferer does nothing but compulsive rituals throughout all waking hours, often late into the night. Suffering from OCD can be substantially reduced because so much is now known about effective treatments. Here, Dr.Greist, an internationally recognized expert in the field, presents the basic information on the disorder. He includes checklists to evaluate symptoms and gives self-treatment suggestions. The questions answered here are those which have arisen in years of treating OCD patients. Whether the disorder is mild and can be self-treated or severe and requires professional intervention, this guide is a starting point for relief.