A It's a fact of life that some babies do bite the breast that feeds them. Biting during breastfeeding is particularly jarring because you're startled during a very relaxed state induced by the calming hormones produced by the body while breastfeeding. Babies naturally want to use their favorite pacifier as a teething ring. Your son not only has learned to associate the breast as a source of nutrition but also as a source of comfort. His habit of biting you, however, can usually be broken if you're not ready to wean him.
First, however, you'll want to prevent a breast infection and allow your nipples to heal. Try air-drying each nipple after every feeding, and, because of the natural healing properties of breast milk, you'll want to massage a few drops of expressed milk onto your nipples several times a day. Also, frequently apply a pure lanolin ointment to you nipples.
As for a long-term solution, you'll need different tactics to alter your baby's behavior. When your son bites the nipple, your natural inclination is to yell "Ouch!" and yank him off the breast; this sudden reaction may shock baby enough so that he may get the message: Don't bite. Some supersensitive babies, though, may go on a temporary nursing strike and will need to be wooed back into breastfeeding. If the yell-and-yank response seems to have no effect, try these techniques that worked well for our little biters:
Finally, if your nipples are still sore even after your son has stopped biting, use a nipple shield for a few days. Using these techniques should help your son to realize that he needs to learn some nursing manners in order to get a fully satisfying meal, and that breastfeeding needs to be a pleasurable experience for both baby and mother.