trichobezoar is a bezoar (a mass found trapped in the gastrointestinal system) formed from the ingestion of hair. Trichobezoars are often associated with trichotillomania (compulsive hair pulling). Trichobezoars are rare, but can be fatal if undetected.. I had a classmate who had to literally shave all of her hair off bc she had this disorder. She caused craters in her scalp from pulling her hair out.

Tricobezoar