Having dealt with this personally some things that worked sometimes 1. Lift the baby a bit higher at the breast 2. Lots of teething things before nursing session 3. Hyland teething tablets 4. Practice sucking sessions on mom's finger with gentle reminders when biting occurs. ( This one I used often with my older nurslings and toddlers) 5. Lansinoh for moms nipples helped with healing and biting for some odd reason. Ruth Solomon, RN, IBCLC mom of 6 long time nursers