question: Hi, I have a blister like inside my mouth and it is in the inside part of my cheek, it is very small and not visible but I can feel it with my tongue, it has been there for more than a year now it never goes away and every time i get pain right in front of my ears that blister gets really big like huge, and at times i feel numbness on one side of my face but the shooting pain its almost always there on my face. I dont know if all this is related or they are symptoms from different conditions. I dont know what to do every time i go to a doctor, the doctor says \"I cant see or feel anything with my finger like a blister inside the mouth\", but as i said earlier its not visible but i feel it with my tongue and it gets huge and then goes back to its normal size again. The pain is very sharp. What could it be? I am afraid its nothing cancerous related. Please advise