My 17 month old boy has a red bump on his gums where his wisdom teeth would be, and there is a small skinny piece of something, it looks like part of a tooth , its very small, but it sitting on top of the red bump, and its loose. I brushed his teeth everyday, and never really noticed this, he also never gave me any fuss when I brushed his teeth, so im guessing it may not hurt, but maybe irritate him.