My toddler goes through phases of biting where he thinks it's amusing to clamp down and drag the nipple through his bloody sharp teeth. I've given up trying to do much about it as its very much linked to teething and goes of its own accord - and he's on his last molars, hurrah.
I find that the broken skin is fine for a couple of days until a scab forms and then feeding is agony for a week.
He has just done it again - is there any way I can manage the bite to avoid the agony stage, or is it inevitable?