Nipple pain during breastfeeding is related to clothing friction, cracked nipples and mastitis. 1. Clothing friction: When the underwear worn by breastfeeding women is too tight, the nipple area will be easily caused by clothing friction, which will lead to nipple pain. 2. Cracked nipples: When the nipple is cracked due to incorrect breastfeeding posture, forcible removal of the nipple from the baby’s mouth during breastfeeding, long breastfeeding time, or lack of attention to localized skin care after breastfeeding, nipple pain during breastfeeding will occur. At the same time, when the baby sucks the milk too hard to cause local cracks can also be manifested as nipple pain. 3. Mastitis: The disease is related to infection, breast trauma, etc. It often causes breast pain, breast lumps, nipple discharge, etc., which can also be manifested as sore nipples during breastfeeding. It is recommended that those who suffer from nipple pain during breastfeeding go to the doctor for a checkup. If it is clear that the disease is caused by the disease, stop breastfeeding and follow the doctor’s instructions for treatment, so as to promote the recovery of the organism. Pay attention to the skin care of nipples in daily life, and try to wear loose, pure cotton underwear. After breastfeeding, you can take the appropriate milk to smear the nipple, help to protect the nipple. In addition, breast hyperplasia, breast trauma, cardiothoracic diseases, herpes zoster, breast cancer and other diseases may also appear the above symptoms, we should consult a doctor in time to clarify the cause of the disease and then carry out appropriate treatment.