Steve, at the risk of being "dressed down by the OCF gods", I would suggest that you try real aloe vera [break off a piece from the plant] on those blisters. Ask your Doc first, but if he shrugs his shoulders, it's worth a shot. Aloe Vera [the secretions from the plant] is known to help heal burns, open sores, etc. If your Doc o.k.'s it and you can't find it, I have a hugh pot growing in my kitchen and I can send you some to pot up and grow. Amy in the Ozarks