I noticed a blister which is not like pimple or bubbly. It's like skin cut blister on top of the tongue area but it looks erected. Other region of the top of the tongue are smooth but this is erected straight and looks white in color. If I touch it, it hurts like sore and painful. It's been like this for many months. I have chronic jaw and tooth pain. I have had several dental work in the last 3 years. No relief for the jaw pain yet. This blister is same size since I noticed. I noticed it many months ago. Able to eat. But it hurts if I touch or rub on it. It's like skin erected from the tongue and I tried to pick it out but I couldn't. It's like attached skin on the tongue. What to do for this and will this go away? I used to get blisters and canker sores in the mouth and side of the tongue by tongue biting etc. But this is different on the top of the tongue and remains the same for many months. Attached the pictures. Since I zoomed it, picture didn't come out clear. It's so small