There are many reasons for the growth of hair on the nipples, the most important of which are the following. First, the nipple has hair follicles on the therefore it is a very normal phenomenon to have hair on the nipple where there are hair follicles, and it does not affect the health of the individual. This phenomenon and genetics have a great relationship, if both parents will appear to have hair on the nipple, then the child’s chances of growing hair are much higher than normal. Second, and endocrine disorders have a certain relationship, in the case of androgen secretion in the chest hair will be abnormally increased, the patient can be instructed to check the endocrine indicators, especially the level of hormone secretion. If the increase in chest hair is caused by abnormal estrogen in the body, you should actively treat the symptoms and prevent further deterioration of the symptoms by taking oral medication to inhibit the secretion of androgens.