my 13 months old preemie son, corrected at 10 months, who only has 1 tooth on the bottom front starting to poke through. I noticed on the lower top of the gums towards the back, he has a large white bump. It looks like a pimple. I don't think its teeth cause those teeth wouldn't grow for awhile yet but I noticed that when I touch it, it hurts him.
please help!