What is a foot skin rash with large water-filled blisters?

Ever since I returned from Viet Nam I regularly get a red, stinging, itching spots between my toes that finally manifest in large water-filled bulbuous blisters that still sting and itch. The blisters finally break and slowly heal over a week with the stinging and itching. It does not respond to normal Athlete's Foot meds and does not look like athletes foot I had experienced prior. The bubble like blisters are the most dominant characteristic. If I can put a name to it, hopefully I can find a specific med to put on it. Many thanks|||Where you in the military when you came back from Viet Nam? If so, go to your closest VA Medical Center and they will take care of you. If not, it's something you need to go to your doctor for, ASAP!|||It's eczema. Go to your doctor and get a prescription for cortisone cream. Clears it right up.|||Its not eczema both of my kids have that and that's not it u need to find a good doctor for that it sounds like just a bad case of athletes foot my dad was in Vietnam .....can i ask what socks u wear ? he can only wear 100% cotton ones since he got back hope this helps.