Folliculitis is an inflammatory response that occurs in the hair follicle's superficial part and may affect either the perifollicular or follicular opening.
Hypertrichosis is any place of the body where there is more hair growth than is typically seen in people of the same age, race, and sex, excluding androgen-induced hair growth.
Hypotrichosis is an uncommon condition where there is little to no hair development on the head, in the places of the body where hair normally grows, such as the brows above the eyes and the edges of the eyelids.
↑Karincaoglu, Yelda; Coskun, Basak K; Seyhan, Muammer E; Bayram, Nalan (2005). "Monilethrix: Improvement with Acitretin". American Journal of Clinical Dermatology. 6 (6): 407–410. doi:10.2165/00128071-200506060-00008. ISSN1175-0561. PMID16343029.
↑Caitlin E. LeClair; Kelly A. McConnell (2025), "Rotavirus", StatPearls, Treasure Island (FL): StatPearls Publishing, PMID32644377, archived from the original on 2022-07-17, retrieved 2026-01-28