I am not so sure about my dentist. I have seen several over the years but this new dentist everytime he does work on me I have blisters in my mouth. Yesterday he fixed a broken tooth and put in a temp crown and now I have blisters inside my lower lip. I am not sure if it was the shot he gave me because I felt electric bolts going through my lip or the chemicals he is using. I took a benadryl last night but the blisters are still there. every time he does dental work on me I get blisters inside my mouth,