What to do if the nipple is bitten by breastfeeding depends on the degree of nipple damage. When the nipple is only slightly damaged surface tissue, can be vitalized iodine disinfection, and local application of Pepto-Bismol ointment, before and after breastfeeding in a timely manner to clean the nipple, can be cured. If the area of nipple breakage is large, acute infection should suspend breastfeeding, empty the milk, and oral penicillin or cephalosporin anti-infection treatment, if the infection extends to the breast tissue, causing acute mastitis, the feasible breast abscess incision and drainage; and once the nipple is broken, it should be immediately to the regular hospital breast surgery or orthopedic surgery surgery for surgical treatment, surgical methods are mostly nipple shaping surgery. In conclusion, good breastfeeding posture and habits should be developed during breastfeeding to avoid nipple injury, and once a nipple bite occurs, it should be consulted in time to avoid serious clinical consequences.