My tooth is a little sensitive but not much and I have a fillings in the back molar that the tissue is growing along side of but the filling has been there since I was a child and I'm 54 yrs. old now.
At first I thought it was a cut along the gum but at closer look it looks like a little finger growing out from the gum by the tooth. It doesn't hurt but some days my tooth is sensitive. It's been like that for about a month. I go in every six months for teeth cleaning and it wasn't there the last time.