### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
I have chewed tobacco off and on for about 10 years.  I would not consider myself a heavy user, but an everyday user.  Most likely about an hour a day on average of having a chew in the mouth.   I recently felt some pain between my lower lip and gum where I would put the chew and immediately stopped chewing and went to my dentist.   I told him and he was not worried at all after doing an oral cancer examination.  He said it should just go away.  It has now been going on for about two weeks and almost completely goes away during the day, but flares up at night with a burning sensation between the lip and gum.  Enough that it makes it very hard to sleep.   However, there are no visible signs of sores or anything in my mouth and I feel fine otherwise.  Is this just a coincedence that the pain is in the same place I usually put the chew? I even called my dentist on the phone to tell him all of this a week after my appointment and he still was not worried, (at least for anything cancerous).  Any ideas???

### output:

Thanks for your question on Chat Doctor. I can understand your concern. Since you are not having any visible ulcer or growth, possibility of oral cancer is very less in your case. The pain sensation you are feeling is mostly due to hypersensitivity of nerves in that area. Tobacco locally irritates the mucosa and so nerves in that area become hypersensitivity and cause painful sensation. So you need to quit tobacco as soon as possible. Start multivitamin tablet containing folic acid, niacin, vitamin b12 and zinc. All these are helpful in nerves regeneration. So discuss all these with your doctor. Hope I have solved your query. Wish you good health. Thanks.