<s>[INST] I have recently had a tooth out and its healing fine. Since then on the gum at the back nearest my tongue there is a small pin sized hole. The pain is similar to what an ulcer feels like but its not one.also i think it may slowly be getting a bit bigger (may be due to me playing with it with my tongue) Should i be concerned and go back to the dentist? [/INST] Hello, thank you for consulting with Chat Doctor. As you are mentioning that you have a hole in your gum, it can be a sinus opening means when there is infection in the tooth, and it spreads to the apex of the tooth, it needs am area to Chat Doctor. But you are also mentioning that you got a tooth removed then it can be from some other adjacent tooth. You should visit your dentist and get an x-ray done, which will show the area of infection. Hope it will help you. </s>