After a child breastfeeding and biting the nipple, it should be disinfected promptly, feeding method should be improved, and breastfeeding time should be controlled. 1. Disinfection: The baby’s mouth contains microorganisms, so you can follow the doctor’s advice to choose hydrogen peroxide disinfection to reduce the risk of wound infection. And the decomposition products after disinfection are oxygen and water, which are not irritating to the baby and mother. 2. Improve the feeding method: you can change the position of holding the baby alternately when breastfeeding, so that the baby’s sucking force is spread around the nipple and areola, reducing the burden of concentrating in one place. 3. Control the baby’s feeding time: Since the nipple is easy to be chapped when immersed in saliva for a long time, the feeding time should not be too long, usually 15 to 20 minutes. In addition, the affected side of the breast needs to be drained of milk to keep the breast clear and prevent lactation and mastitis. Wash the nipple with warm water or apply vitamin A and D to the cracked nipple as prescribed by the doctor to promote the metabolism of the skin tissue and improve the local nutrition of the skin. When there are other inappropriate breasts, it is recommended to consult a doctor in time, follow the doctor’s instructions to carry out relevant examinations, clarify the causes with the help of the doctor, and carry out targeted treatment or therapy.