Hirsutism — abnormal hair growth with a male pattern of distribution — is one of the main manifestations of PCOS, with about 70-80% of women with PCOS experiencing this condition.[1] The primary cause of hirsutism in PCOS is an excess of androgens and an increased sensitivity of hair follicles to androgens, leading to abnormal patterns of hair growth. Reducing androgen secretion is the main treatment for hirsutism, which can be accomplished by using a combined oral contraceptive and antiandrogen treatment regimen or a combination of antiandrogens and another method of contraception (the latter due to the risk of birth defects from antiandrogens). Metformin and lifestyle changes may also be effective.[1]
Why does PCOS lead to excess hair growth?
Written by:
Fact-checked
by:
•Last Updated: May 16, 2025
Polycystic ovary syndrome leads to excess hair growth, known as hirsutism, in 70% to 80% of affected individuals due to elevated androgen levels and increased sensitivity of hair follicles to androgens. Treatment typically involves reducing androgen secretion through combined oral contraceptives, antiandrogens, or lifestyle changes.