Nipple ulcers are always bad during breastfeeding. It is recommended to suspend breastfeeding on the affected side first and suckle the milk regularly, pay attention to daily nursing care, and use medication such as erythromycin ointment. 1. Stop breastfeeding on the affected side: Nipple ulcers can occur if a woman breastfeeds with a poor breastfeeding posture or if the baby bites through the nipple after teething. It is recommended to suspend breastfeeding on the affected side of the breast at this time, and still use a breast pump to suck out the milk at intervals of about 2 hours to avoid prolonged milk rises, resulting in breast inflammation. 2. Pay attention to daily care: usually pay attention to nipple care, keep the nipple dry and clean. At the same time, you can also use warm towels to apply hot compresses to the affected breasts to promote local blood circulation. In daily life, you should pay attention to wear loose and comfortable underwear to avoid friction and moisture in the nipple area. 3. Use of drugs: you can apply erythromycin ointment on the affected breast under the guidance of the doctor, which has the effect of promoting the healing of the wound. If the nipple ulcer localized obvious purulent secretion outflow, then need to take anti-inflammatory drugs under the guidance of the doctor anti-infection treatment. Once abnormalities occur during breastfeeding, you should seek timely medical treatment under the guidance of your doctor.