Frontal fibrosing alopecia (FFA) is a type of patterned scarring hair loss characterized by a gradual recession of the hairline, primarily affecting women. The cause is uncertain, but genetics, environmental factors, autoimmunity, and hormones are likely important factors. Postmenopausal women are particularly susceptible to FFA due to declining levels of estrogen, which has a protective effect on hair follicles.

Early signs of FFA include scalp itch or discomfort that may be accompanied by subtle facial papules along the hairline. Hairline recession and eyebrow thinning may follow. A biopsy may be necessary to diagnose FFA. As FFA can lead to permanent hair loss, halting progression is a goal of treatment. Treatment may include topical therapies, oral medications, and steroid injections to the scalp.