hi. i have tiny blisters on roof of mouth which have now burst and are really painful.it looks like a large coldsore.i also get tiny blisters on feet and hands which dont respond to anti fungal treatment and was wondering if this is linked to my sore mouth.
Thanks for your query, I have gone through your query. The painful blisters could be because of the herpes virus infection(zoster). The blisters in the other areas could also be because of viral infection. Consult an oral physician and get it ruled out. If it is a viral infection then take a course of antiviral Chat Doctor.  For the pain You can also take topical anesthetic and analgesics like Anabel gel. I hope my answer will help you, take care.