It’s pretty annoying when your baby sprouts a tooth and suddenly everyone’s clamoring to know if he’s bitten you, right? (Oh, the drama!). Most likely, those comments are more dangerous than any potential bite itself. Fear of getting bitten by your child is no reason to avoid breastfeeding. Trust me, this is not a problem exclusive to the lactating set — as a formula-fed baby myself, I had a rather serious biting problem in my toddlerhood and the rampage was released upon everything and anything… except nipples (but was no less painful to tolerate, I recall).
Mama's Milk, No Chaser 