<s>[INST] I have a very small indention on my gums on the left side. i think i might need a root canal. however i am worried the indention is not raised, red or white it is not in the form of a patch, it is by it self like a canker sore.. but instead of raised it is depressed. i used to use dip... what do you think [/INST] Hello, thank you for consulting with Chat Doctor. It can be possible that this gum indentation can not be because of tooth infection, as in case of infected tooth abscess there might be a discharge from this indentation. So it can be possible that it might be just an authors ulcer. So there is nothing to worry you just wait for 1 week if it does not go, then you have to go for root canal. Hope it will help you. </s>