If the nipple is sucked and painful, you should stop breastfeeding, disinfect the nipple and squeeze out the milk, and promptly consult a doctor for corresponding treatment as follows: 1. Stop breastfeeding immediately to avoid stimulation of the nipple caused by breastfeeding; 2. Disinfect the nipple area by rinsing it with water and applying erythromycin ointment for treatment after drying or use milk to evenly apply it to the ruptured area because Milk has a very good nourishing effect. The next time you breastfeed, clean the ointment to avoid the child eating into the mouth; 3. Squeeze out the milk in time to avoid milk stagnation and mastitis; 4. If the nipple rupture is serious or there is extensive bleeding, you need to go to the hospital for anti-inflammatory treatment in time to avoid local infection.