What is the most common form of treatment for women with hirsutism and is does it work?

Underlying cause. The first line is to treat the underlying cause: polycystic ovarian syndrome and congenital adrenal hyperplasia are 2 common disorders that include hirsutism. Idiopathic hirsutism (without underlying cause) is treated with a combined approach, which can include birth control pills, anti-androgenic oral drugs, and sometimes tweezing, shaving or electrolysis.
Hirsutism. Oral contraceptives contain Estrogens which increase a natural protein called shbg - sex hormone binding globulin. This binds up testosterone and does not allow it to stimulate the hair follicle.