Frontal fibrosing alopecia (FFA) is a cicatricial alopecia of unknown etiology. The incidence of FFA appears to be increasing with time, leading to suspicion of a possible environmental trigger. Observational studies have reported a positive correlation between facial sunscreen use and FFA. This finding raises the question of whether sunscreen use plays a role in disease development. In this article, we review the available literature on the association of sunscreen with FFA. There is insufficient evidence to establish a direct causal relationship between sunscreen and FFA. Further studies are required to better characterize the role of sunscreen and the environment in the pathogenesis of this unique disease.

Androgenetic alopecia (AGA), also known as pattern hair loss, represents the most common subtype of hair loss, affecting 50% of individuals aged 40 years and older. This form of nonscarring alopecia involves a reduction in scalp hair density due to miniaturization of coarse terminal hairs to vellus hairs and prolongation of the telogen phase of the hair cycle. Clinically, AGA occurs in 2 classic sex-based patterns, “male pattern” characterized by M-shaped recession of the frontal hairline and vertex thinning and “female pattern” involving a Christmas-tree thinning pattern disproportionally affecting the crown scalp. Although these distinct patterns may occur more frequently in each sex respectively, patients with AGA may display either pattern or a combination of both.

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Sandra Jones

Journal Manager

Hair Therapy and Transplantation

Email: hairtherapy@emedscholar.com