hello, it is better to see the case clinically. visit a dentist and get it checked. he will be able to give you a proper diagnosis and treatment plan. If required, consult an oral surgeon.

Hello there.  I can understand your concern.  We do not know whay it has happend dear friend as we have neither examined you nor we have seen it. You could have attached a picture of it, don't you think? Consult a dermatologist in person for further evaluation and management. Best regards. Dr. Anil kumar jain. Bangalore.