September 2021 in “CRC Press eBooks” Alopecia areata incognita causes sudden hair thinning, responds well to steroids, and is more common in those with genetic hair loss conditions.
10 citations,
August 2012 in “Current Problems in Pediatric and Adolescent Health Care” Hair changes can indicate systemic diseases or medication effects.
4 citations,
January 2007 in “Australian Veterinary Journal” A horse's sudden hair loss was caused by an allergic reaction to a coat conditioning powder.
July 2023 in “Journal of Clinical Medicine” The document concludes that understanding hair follicle histology and the hair cycle is crucial for diagnosing alopecia.
2 citations,
June 1980 in “International Journal of Dermatology” Scalp biopsies are important for diagnosing hair loss conditions.