Welcome to OCF! Sure hope you do not have to be here! Only thru a biopsy will there be an answer to what is going on with your son. I hope it is nothing serious!

As far as the tobacco use goes, that needs to stop immediately! Tobacco is full of all kinds of known cancer causing chemicals. I know quitting isnt easy. But it really is a necessity! Smoking is an option and at his age hopefully he has not been doing it that long so he can easily quit. I am a former smoker who now is disfigured and went thru oral cancer 3 times all due to my habit. If your son had his wisdom teeth removed he should not be smoking right now anyway, so hopefully this will help him to quit. By smoking when having extractions there is a high risk of dry socket which can be very painful.

Try your best not to panic. At this point you dont know what you are dealing with. Hopefully you will get him into see an oral surgeon or ENT who deals with oral cancer patients so a biopsy can be taken. After the biopsy is done, it will be another week until the full results come in. Its probably going to take a couple weeks to find out what is going on.

Best wishes and keep us posted.