Hi,I have a decayed tooth in my mouth,it's been there for a while now. Initially,I felt a lot of pain there but I didn't want it extracted because I have already lost four of my teeth. I used pain killers when the pains came. Right now I don't feel much pains in that tooth,I even chew with it even though it has a hole. I'm curious can that tooth affect my health if I don't get it extracted being that it does not pain so much any longer?