My 8-year-old son has a loose tooth (upper/immediately next to the front tooth), and all the gum tissue right above that tooth is dark purple. It is not swollen, and he does not have pain. This is the last non-molar tooth that he has not lost yet. The other permanent teeth are already in for all the others. The tooth is quite wiggly, but when we wiggle it, the entire gum section wants to move with it. Despite being quite wiggly, it does not bleed. Any ideas? Should we go to a dentist about the purple gums? Thanks!