If i chew tobacco once in a while, can i get mouth cancer?

Yes: So do not chew tobacco at all.

Yes, you can : Even though perhaps you only chew once in a while, unfortunately, yes you can still get a mouth cancer. Obviously the risk will be higher if you also drink alcohol, or have other bad habits.. So, stop chewing any tobacco.

Yes: You can get oral cancer even if you don't chew tobacco at all, but obviously chewing increases your risk. The more you do it, the greater your risk, but even small amounts will increase that risk.

Yes: Yes. 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, hoarseness or feeling that something is caught in the throat that does not go away, difficulty swallowing/chewing.