For the past week I've had what seems to be a sore on my bottom lip. Like it may be an ulcer or something. At first I could feel it was raised a bit and it hurt at the slightest tough. Just after I noticed it I got sick (Coughing, sneezing etc)... Over the past few days it seems to have gone down a bit and it doesnt hurt anymore unless I press it hard with my tongue but its STILL there. What concerns me is that I have had a hard time quitting smokeless tobacco. This sore is in the middle and I always placed my dip to the sides of my mouth. ALso I had my wisdom teeth removed recently (late april/ early may). If this was anything to worry about would the oral surgeon had been able to see something then? Is there always spme sort of precuror before oral cancer? Does this sound like anything to worry about?