Hi.. Can understand your concern.. As per your complain a large bump on the tongue in case if you have a a chipped tooth and erupting wisdom tooth and you have a habit of continuously rubbing your tongue in that area there is a chance that there has been continuous friction on the tongue mucosa and injury led to formation of a TRAUMATIC ULCER.. You need not to worry about it as it is a self resolving condition and can heal itself very well.. What you should take care of is that you should avoid placing the tongue over the teeth and prevent injury.. In case if you have pain you can apply oragel and can take advil.. Sucking ice pops can also be relieving.. Maintain a good oral hygiene and avoid very hot and spicy food.. Hope this information helps.. If you find the answer helpful kindly write a positive review and click on found this answer helpful as a token of appreciation.. Thanks and regards.. Dr.Honey Nandwani Arora.