You searched for: “traumatic alopecia
traumatic alopecia (s), traumatic alopecias (pl) (nouns)
Hair loss caused by injury to the scalp.

Common causes include the use of caustic hair straighteners; especially, those that include lye as an ingredient; stress traction injury from tight rollers and braiding; over heating of the hair shafts; and the compulsive pulling out of hair (trichotillomania).