Nipples are not the same size in the normal human body occurs, do not need too much attention, itself the human body is not a completely symmetrical whole, breast development is not exactly the same, nipple size is not necessarily completely symmetrical. The main role of breast and nipple is breastfeeding, if it does not affect the function of breastfeeding does not affect the secretion of milk, the size is not a problem, need to pay special attention to itself two nipples are symmetrical in size, but in a very short period of time the symptoms of the size of the nipple, with or without nipple secretion and pain, swelling and pain and so on, it may be a breast pathology, you need to go to gynecology as soon as possible to consult, and to do the relevant tests such as It is necessary to go to the gynecologist as soon as possible and have relevant examinations such as molybdenum target examination or tissue biopsy to determine whether there is a disease and the nature of the disease.