The causes of increased hair are divided into two factors, one is caused by elevated androgens and the other is caused by non-androgen dependence, the details are as follows: a. Increased hair caused by elevated androgens: the most important manifestations are the face, upper jaw, the central area of the chest and abdomen, the inner thighs, the areola, and the pubic hair in a hairy state. In the case of females, the hair distribution of males is mainly related to androgens. If androgens are elevated, patients should also have their sex hormones tested. Second, non-androgen-dependent hair growth: It does not lead to increased hair on the face and genital organs, and there is no specific regional distribution. It is mainly seen in adrenal thyroid disease, psychogenic anorexia, or the effect of phenytoin sodium, minoxidil, cyclosporine and other drugs.