Everyone is a moon and has a dark side which he never shows to nobody wrote Mark Twain. Twain's observation is true to all human beings. Every human being has different sides in his persona and many things attribute to this. In a man personality is a deeply engraved pattern of behavior that includes his ways of understanding, relating and thinking about one self and the surrounding environment.

Personality traits are normally aspects of a personality. Personality disorder occur when these personality traits become abnormal inflexible unadaptive and cause sufficient social or occupational impairment along with a lot of personal dishes.

Obsessive-compulsive disorder in one such personality disorder, which is characterized by anxious thoughts or rituals, which the patient feels he or she cannot control. It strikes men and women in equal numbers and affects about 1 in every 50 people.