Hello, I am a 25 year old male. I have this weird kind of white ring on my back lower left gums, between the base of my last two molars. It doesn't look like an ulceration to me and in the white ring appears to me like normal gum tissue. The area does not feel abnormal, thick, or rough nor is it painful. I noticed it a little over a week ago. I used to smoke cigarettes (maybe 1 to 2 packs a week, never more than half a pack a day at worst) in college and a year after. I quit cigarettes in may and occasionally smoke out of a pipe (1 or 2 times a week but not for the last 2 weeks). I drink occasionally, but haven't since this showed up. I am a bit of a hypochondriac and within the last month have been to the dentist who said everything was fine, but that was before I noticed this. I don't have dental insurance and I really don't want to spend over $100 again just to have him look at this if it is nothing serious. Of course I am worried it's early leukoplakia or an early SCC, but I can't find any kind of pictures that appear like this. Any ideas?