Wiktionary
trichophagia
n. Compulsive eating of hair.
Wikipedia
Trichophagia
Trichophagia is the compulsive eating of hair associated with trichotillomania (hair pulling). In trichophagia, people with trichotillomania also ingest the hair that they pull; in extreme (and rare) cases this can lead to a hair ball ( trichobezoar).