My husband has an area on the roof of his mouth that is very red and some of the skin looks almost like a blister has burst there.  Its close to his teeth but he says the actual tooth does not hurt.  Its very painful and made worse by eating or drinking anything hot or cold.  Hes had it about three days and its gotten progressively worse.
Hi. Welcome to Chat Doctor. As per your complaint painful sore and inflamed area at the roof of the mouth can be due to causes like formation of an ulcer that has been traumatized and inflamed. It can also be due to biting something very hard causing injury to the mucosa. Another cause can be burning of the roof of the mouth with some hot foods or fluids or chemical substances. I would suggest that he should start applying numbing gel over the sore area to relieve pain especially before meals to make eating painless. Do cool compresses or suck ice pops. Avoid spicy and hard foods and take a soft bland diet. Take Ibuprofen to relieve inflammation and pain. Do antiseptic mouthwash gargles. Hope this helps. Regards.