Psoriasis
It appears to be a buildup of dry skin on your body.  You can have it at any age, but normally as you get older.  It starts with the skin cracking as a paper cut on your fingertips. This skin would begin to die, flake, peal and itch. As your itch the area, it begins to get red and then it begins to blister, flake and peels to raw skin.  It appears most often on hands, toes, the inside arch of your feet and on your heels.  It is also shows up in callus, by cracking.  When washing hands it has a burning effect.