Hi every winter after summer is over I get these blisters with pus in them on my palms and on the outside of my feet. My feet also get bad scabs after the blisters pop, I don't get the scabs on my palms thou. I've tried different ointments and went to a foot Dr. and he prescribed three different medicines and nothing works. Then when the weather starts to get nice where I can wear sandals they go awhile. They also get painful on my feet. Do you know what it could be?