Re: mouth blood blisters
I recommend see your allergist about getting allergy testing done.. not just the standard scratch tests but the full blown skin contact studies as well. Also visit a dermatologist.
In addition to being allergic to too much to write down:
Main foods that trigger mouth and throat blisters before extreme swelling and restricted breathing and so forth for me..
All but RomaTomatos, onion, strawberries, mushrooms, seafood (iodine), wheat(in about every processed carb made today), yeast, alcohol, coconut, pine nuts.. I am going to stop.
Anyway I have acute contact dermatitus, exzyma, rosecea, and contact allergies not detected by my normally allergy testing.
I found i was allergic to propylene glycone, cobalt, nickle, iodine(again), formaldehyde, a urea - formaldyhde producer, wool.. the list went on.
Well propylene glycol and some of the others were in everything I used, keeping my skin breaking out, drying out and constantly itching. It also made my system more likely to react to environmental triggers.
Now however annoying it is too keep my phones PDA full of all my allergies, I can avoid things that were unknown to me and aggrevating me on a daily basis. Propylene glycol was my biggy. It is a preservative in everything from prepared meats to backed goods. At least I am a good cook and make all my food from scratch.
If I avoid my allergens: food and contact, I rarely have mouth blisters develope anymore.
If we learn by our mistakes, I am working on one hell of an education.