I have felt this, on my hands. I have pomphylox, or "DE" as its called. itchy blisters, clear pus, craking and split fingers. how does yours manifest. I have my own little theory. the DE in my case is caused by mycoplasma infection deep under the skin. the hot water kills them. most based on intuition, and one other fact. several years ago I had another infection on my hand, called sporotrichosis. one of the old time treatments was to hold your arm under water as hot as could be tolerated, for long periods. it killed the infection off over time.