This September, let's increase awareness of a specific type of alopecia, Trichotillomania. Trichotillomania is an obsessive compulsive disorder that causes people to pull out their own hair. At the root of an obsessive-compulsive disorder is a mental disorder in which people have unwanted and repeated thoughts, feelings, ideas, sensations (obsessions) and behaviors that drive them to do something over and over (compulsions).