OCD is a vicious cycle of repeated feelings, ideas, thoughts, sensations and behaviors that drive individuals to a compulsion. For example, the fear of dirt or contamination may lead to obsessive hand-washing and avoidance of social situations due to germs.
Sometimes, the fear is so intense and so gripping that those suffering from OCD feel they may harm themselves or others if they cannot complete their rituals. For these reasons, many turn to drugs, alcohol or restrictive eating to deal with their anxiety.