I was wondering what are the first signs of mouth cancer, or other gum and mouth related diseases because of smokeless tobacco?

Smokeless tobacco: Smokeless tobacco, as well as smoking cigarettes, cigars ; pipes all cause oral cancers. Rather than waiting until you develop early lesions, stop right now! these lesions start on a microscopic level until you notice (or don't because it's in a hidden spot) a red or white spot, ulcer or bump. Any lesion that lasts more than two weeks should be biopsied. Add alcohol 2 the mix and you increase risk.

A few signs/symptoms: See oral surgeon or ENT doc if you have any of these symptoms: Persistent mouth sore, persistent mouth pain, a lump or thickening in the cheek, a white/red patch on the gums, tongue, tonsil, or lining of the mouth, a sore throat or feeling that something is caught in the throat that does not go away, difficulty swallowing/chewing.