Girls with a lot of underarm hair may be caused by heredity, endocrine, drugs and other factors. It is recommended to make a clear diagnosis, give appropriate medication, and if necessary, through laser hair removal treatment, which can permanently remove underarm hair. 1. Heredity: Parents and family elders who have a lot of body hair are affected by genetic factors, which may lead to a lot of body hair. Hair removal creams remove the hair and it will grow again after a long time. Consider laser treatment, laser irradiation of hair follicles, destroy the structure of the hair follicle so that it loses the ability to produce hair, can achieve permanent hair removal effect. 2. Endocrine: polycystic ovary syndrome patients, the body androgen level rises, resulting in underarm hair exuberance. It is recommended to eat a light diet, quit smoking and drinking, improve bad habits, and increase the amount of exercise, which is conducive to weight control. If necessary, oral drospirenone ethinyl estradiol, ethinyl estradiol cyproterone and other drugs, can relieve the symptoms of high androgen. 3. Drugs: long-term high-dose corticosteroid or topical hair growth drugs, may lead to aggravation of body hair throughout the body. It is recommended to stop taking suspicious drugs after visiting a regular hospital, and can also be combined with laser hair removal symptomatic. Girls with a lot of underarm hair, it is recommended not to shave often, in order to avoid causing skin damage, induced infection. It is recommended to go to the regular hospital to understand the cause, for the cause of the treatment, but also through the laser hair removal treatment, you can remove underarm hair.