Re: biting, blistering, searing pain
This sounds like it could be an infected bite. I would try air drying after nursing, followed by application of a mix of Bacitracin antibiotic ointment and 1% hydrocortisone cream (use pea sized amount, mixed and applied using a clean finger). Salt water rinses would probably also be helpful, and it would definitely be a good idea to vary your nursing position so that baby's teeth land somewhere else.
If it gets worse, see your doctor.
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