Nipple is sucked by the baby bad bleeding can be general treatment such as suspension of breastfeeding, combined with the use of erythromycin ointment for those who are infected, and so on. 1. General treatment: During the breastfeeding period, if the nipple is sucked by the baby resulting in damage and bleeding, you can suspend breastfeeding on that side of the breast, and change the other side of the breast for feeding. Then you can use saline to clean the affected nipple, or use iodine povidone to sterilize it if the crack is big. And use the breast pump to discharge the milk regularly, so as to avoid the accumulation of milk, which may cause breast swelling and pain. 2. Combined infection: If the damaged nipple is bleeding and infected, erythromycin ointment can be used for external application and antibacterial treatment. It is forbidden for those who are allergic to this product. If the nipple bleeding is serious, you should consult a doctor in time.