OCD is also an anxiety disorder characterized by intense recurrent unwanted thoughts and rituals that are beyond the persons control. Examples are: hand washing, counting, checking, repeating, cleaning and endless rearranging of objects in order to ensure they are in precise allignment. The person finds it very hard to control themselves. If the person doesn't perform these rituals, anxiety increases dramatically and the person begins to think that something terrible will happen because they didn't do the ritual.