Cheek biting?

[lilith]

im already a bad cheek biter and end up with lots of lesions, sometimes painful but usually peel and go away after a while so im hoping this lesion and the smaller one below is the same thing. its just quite round in shape and the skin doesnt peel so i was abit anxious

 

[lilith]

boosting with a slightly clearer image

 

[honestdoc]

You may be developing abnormal hyperkeratinized (callous) tissue. It could become pre-cancerous. Get it checked and fixed...smooth the sharp cusps, restoration, ortho, bite guard, etc.