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Obsessive-Compulsive Disorder is a mental illness in which a person experiences recurrent, intrusive thoughts and feels compelled to perform certain behaviors again and again (Wade & Tavris, 2000). Most people have experienced bizarre or inappropriate thoughts and have engaged in repetitive behaviors at times. However, people with obsessive-compulsive disorder find that their disturbing thoughts and behaviors consume large amounts of time, cause them anxiety and distress, and interfere with their ability to function at work and in …

…a child, would wrap his hair around his fingers tighter and tighter until he would actually pull his hair out. It's amazing how, when looked at close enough, many of the disorders are linked together. I think it's because so many of them are caused by the same chemical imbalance. I believe that OCD is caused, at least in part, by a serotonin imbalance. There are many disorders caused by a an imbalance of serotonin.