Testosterone refers to a hormone that belongs to androgen, one of the important hormones used to maintain secondary sexual characteristics in men. Testosterone is secreted by the testes of male patients, and is also controlled by the pituitary gland. It is recommended that if a patient has sparse body hair or body hair loss, he must go to the hospital in time for relevant examinations, such as checking the testosterone in the male body, if the testosterone value is low, it means that the testosterone in the body cannot maintain male secondary sex characteristics, which will lead to sparse male body hair and body hair loss, and should Timely medication should be used to correct low testosterone to avoid prolonged low testosterone, which may lead to feminine features in male patients. For example, fat accumulation in the chest, testicular atrophy, scrotal sagging, and even male impotence and infertility may occur.