### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
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

### output:

Tithe blister like feeling that you can sense through your tone might be the parotid papilla. The parotid gland (the gland around your ear opens into the oral cavity on the inner surface of the cheek, usually opposite the maxillary second molar tooth) and its duct are associated with the main nerve of your face (the facial nerve) . Any swelling /stone /enlargement /abnormality in the gland/salivary duct associated, can lead to unnecessary stimulation of the nerve and lead to the pain that you have mentioned usually in the area around the ear. Please visit an oral physician to rule out the above and note the precise time of pain and any stimulant associated (like immediately after meals, the swelling might subside), oral Chat Doctor.  Hope this could be of some help. Take care,