i have used tobacco for a few years.  there is a small lump inside my cheek, between the very back molars about 2mm in size.  it is the same color as the rest of my mouth. i have noticed it after chewing tobacco for the first time in a long time, and has been there about 10 days unchanged.  should i be worried
Hello, The best advice is to STOP chewing tobacco. This is a habit with a known risk of mouth cancer, and you admit to being worried. You are safest to be seen by a dentist and have a clinical exam. If needed, a biopsy could be taken. The location on your cheek could be from biting your cheek while chewing. The cheek can swell and you can remain inflamed. Look to see if you see a bit of a line following where your teeth meet. You could have a small caste or even have located your salivary duct. Ducts sometimes get clogged and could present this way. You do not mention a sore or border. Any change or notable increase is of concern. I advise to be checked by the dentist!