The nipple has a granular material, you can use your hand to pick down, consider may be the nipple cuticle shedding reasons. Normal human skin cell apoptosis after the formation of the stratum corneum, with the stratum corneum gradually metabolized off, if the usual cleaning is not timely can be formed granular debris-like material, with the hand can be keyed down, in the absence of pain and discomfort or other abnormalities is not a big problem. Due to the nipple part of the sebaceous glands are relatively rich, often secrete oil, the nipple to play a protective role, the accumulation of oil after drying, which is also the nipple part of the granular debris of the reason. In addition, because the nipple is the opening of the milk ducts, there is a small amount of secretion discharged from the milk ducts, which will also accumulate in the nipple area. The combination of the above three factors, easy to form granular debris in the nipple, as long as there is no redness, swelling, pain is a normal phenomenon, usually try not to use your hands to pick and scratch, you can use warm water to localized hot compresses, wait for the softening and then remove.