Trichology is the scientific study of the hair and scalp. This specialized dermatology field encompasses various aspects, including the diagnosis and treatment of hair and scalp disorders. Experts in trichology, known as trichologists, deal with conditions such as hair loss, hair thinning, scalp psoriasis, dandruff, and alopecia areata, among others.

The Institute of Trichologists was founded in 1902. The first journal for the field, International Journal of Trichology, was founded in 2009.