During the past 1 year I have had the skin thickening on my thumbs and index fingers. It starts off with a slight pain to the tip of the thumb (or finger), then the sense of touch to the area is no longer normal and sure enough the skin at the tip will be thicker. It will continue to thicken for a few days and then starts to crack and peel away. Thick pieces, like several layers at once seem to break off leaving very sensitive and tender skin underneath. It has never involved the whole digit. Just the tip and to the first knuckle.
And as of last week, there is an outbreak of the ball of one of my feet. Exact same pattern. First time for it to occur anywhere other than my hands.
The process takes a month from start to finish to do all this then heal up before it starts up again without a break.
Any ideas as to what caused this?