The growth of male facial hair is related to the development of secondary sexual characteristics, usually beginning to appear after puberty as the level of androgens secreted by the testes increases. However, the amount of facial hair may vary among individuals, which is a normal variation under normal circumstances. The amount and shape of facial hair may be related to ethnicity and family genetics. If a male has entered puberty but has not grown facial hair, further examination and treatment may be required.

Patients inquire about treatment methods for small penis and underdeveloped testicles, as well as how to address related sexual dysfunction issues.