Good Morning,
It could be a common wart or even a bone projection (this is quite common on the roof of the mouth and usually doesn't cause any problems), but any time you have a new growth in your mouth you should see your dentist or doctor for a physical examination due to the risk of mouth cancer.
If you found this answer helpful, PLEASE CLICK on ACCEPT and leave FEEDBACK. Accepting an answer that you are able to use improves both of our ratings. Thanks!
Lori