When breastfeeding breaks the nipple, depending on the condition of the wound, you should choose to wash the wound with warm salt water, apply milk or goat’s fat cream, or apply antibiotics topically, and then terminate breastfeeding if necessary. If the nipple is broken with pain during breastfeeding, the size of the wound and the severity of the pain will determine the treatment method. If there is no obvious wound, just a slight localized nipple crack, warm salt water can be cleaned after breastfeeding, and generally will not affect the patient’s breastfeeding. If the nipple wound is deeper, it is necessary to stop breastfeeding on the affected side, breastfeeding with only the healthy side of the nipple, emptying the affected side of the breast of milk, nipple disinfection with iodine volts, and applying some ointment containing antibiotics, such as erythromycin ointment, and so on. Nipple biting can easily be followed by bacterial invasion and lead to mastitis, so you should use the correct method and position to breastfeed.