I have a sore on this inside cheek of my mouth, at the top near the bottom of my upper teeth. It doesn’t really hurt its just irritating and I don’t know what it is. It almost looks like I bit myself but I know that I didnt, at least not hard enough to leave that mark. Can you give me some ideas on what it could be and how to treat it?
It is impossible to be sure without examining you but it sounds like it is possibly an ulcer.
Use warm water with a tea spoon of salt in it to rinse your mouth out with and if it lasts longer than 7 days book an appointment with your dentist.