The nipple crack is a superficial ulcer that occurs on the nipple during lactation, more often in primiparous than in transitional mothers. A common cause is poor nipple development (invagination, too small), breastfeeding difficulties, infant sucking too much force occurred injury. The second is excessive milk secretion and overflow eroding the nipple and surrounding skin, causing erosion or eczema. In addition, nipple trauma, infant oral inflammation, breastfeeding process will nipple bite can also cause nipple cracking. The first is a small crack and ulcer on the surface of the nipple, and there is severe pain when breastfeeding, and second, the number and duration of breastfeeding is reduced due to painful breastfeeding, resulting in milk stagnation or bacterial infection and mastitis. Prevention and treatment 1. Pay attention to the cleanliness and hygiene of the nipples during pregnancy, and correct nipple entrapment by gently pulling. 2, to develop good breastfeeding habits, do not ask the baby to sleep with the nipple, and to develop the habit of cleaning the nipple before and after breastfeeding, pay attention to the baby’s oral hygiene. 3, has appeared chapped can be cleaned around the nipple after the application of red willow cream, erythromycin ointment and other drugs; can also use food oil to soften the chapped area, so that it heals and reduce pain. Nipple cracking more serious can suspend breastfeeding 1-2 days, with a breast pump to suck out the milk, adhere to the external drug treatment, in addition, should avoid stimulating food.