Biting/clamping while breastfeeding

Martha

My 19-day old son has no problem latching but he likes to bite/clamp down on my nipps all the time. We have been to a Lactation consultant and she said to take him off and just put him back on again. I've tried this and but can't say it has actually worked. I want to keep breastfeeding him but it hurts so much. Anyone else had this and what did you do? Thanks!