I got a splinter doing house cleaning the other day and I just this morning got the splinter removed. It looks horrible and much worse than your little bumps. So, I would venture to say that if you had teeth in your skin it would blister or puss up more than that as your body tried to attack them. I bet anything it is a small allergic reaction to the bite. If it starts to get red and tender around the little blister areas I would see a doctor for possible infection but if not I would just let it heal.