The nipple bites and cracks during breastfeeding can be treated by local disinfection, stopping breastfeeding and taking medication. 1. Local disinfection: After the nipple is bitten and cracked during breastfeeding, the nipple area should be disinfected with iodophor and other drugs in order to prevent bacterial or viral growth and inflammatory diseases. 2. Stop Breastfeeding: Patients with cracked nipples during breastfeeding should stop breastfeeding in time to avoid repeated stimulation of the injured nipple. 3. Take medication: Breastfeeding nipple bite cracked by bacterial infection may cause mastitis, this case can also take levofloxacin and metronidazole and other antibiotics to help eliminate inflammation to control the cause of the disease. Patients with cracked nipples during breastfeeding should go to the hospital in time to take appropriate treatment.