<unk>  is caused by the ingestion of hair.<unk>  is characterized by a compulsive disorder of pulling one's own hair and ingesting it. There are several psychiatric disorders that are associated with<unk> , such as trichotillomania, trichophagia, and pica. Trichotillomania is the compulsion to pull out one's own hair; if an individual consumes it after ripping it out as well, it is known as tricophagia. Pica comes from the Latin word for "magpie" and involves the craving of non-food items such as cloth, wool, hair, or even small metallic objects.
Rapunzel syndrome
Pretzel syndrome
Nezelof syndrome
Beare–Stevenson cutis gyrata syndrome
Van Wyk and Grumbach syndrome
Johnson–McMillin syndrome
Franceschetti–Klein syndrome
Irlen syndrome