I had 2 front top teeht capped at a clinic. Since then the inside of my upper lip is always tender, hurts but no sores. The clinic dr said ask my gp, my gp said see a dentist. Could I be allergic to the material used for the caps as the bottom lip is fine. Im  a female 73 yts old.
Hello:)Welcome to Chat Doctor. You did not mention the type of crown on the tooth. Nickel and certain metals can be allergic. I suggest you to go for a skin test. People who are allergic to artificial jewelry are prone to this. You can go for a zirconia crown if it tests positive. Hope this helps.