Most of the sore nipples after breastfeeding are caused by incorrect breastfeeding methods, while cracked nipples, acute mastitis, breast hyperplasia and so on can also lead to sore nipples, which need to be adjusted to breastfeeding methods, empty milk, anti-inflammatory and so on to treat. 1. Cracked nipples lead to sore nipples, mostly caused by babies biting their nipples, mostly small cracks that are not easy to find, and require timely adjustment of breastfeeding to prevent further nipple cracks, as well as attention to daily care and moisturizing of the skin around the nipple. 2. Breastfeeding women who have sore nipples after breastfeeding are also susceptible to acute mastitis, if the milk is not drained from the breast in a timely manner, it will result in a blockage of the mammary glands, hard lumps in the breasts, redness, swelling and pain, and in severe cases there will be a fever, at this time, it is necessary to rub out the milk in the breasts and drain it, if it is not timely to deal with the situation, it will lead to serious infections or mammary gland abscess, and you need to seek medical attention in time for formal treatment. 3. There may also be breast diseases such as breast hyperplasia, the main symptoms of which are breast pain, nodules or lumps, and nipple discharge in some patients. Need to give adequate individualized psychological intervention and drug treatment, if necessary, take a biopsy to decide whether to operate. Unexplained nipple pain after breastfeeding should also be considered trauma, tumors and other factors, it is recommended to go to the regular hospital for timely consultation.