What is obessive cumpulsive disorder

Obsessive-compulsive disorder (OCD) is a human anxiety disorder characterized by involuntary intrusive thoughts. When a sufferer begins to acknowledge these intrusive thoughts, the sufferer then develops anxiety based on the dread that something bad will happen. The sufferer feels compelled to voluntarily perform irrational, time-consuming behaviors to diminish the anxiety.


http://en.wikipedia.org/wiki/Obsessive%E2%80%93compulsive_disorder