so will a nasty case of athletes' foot. If the area burns, and the skin is peeling off in chunks several layers deep, you may well have it. Its common to pick it up in public access showers if they are not disinfected properly. I got my first case in Port Credit Marina about 30 years ago. Get some of the liquid solution, and wash your feet, then apply the liquid. Then apply athletes' foot powder as well. Wash and sterilize all your socks. Spray your shoes with lysol.
Always wear shoes when going to the shower
However if you are indeed diabetic, best get to a doctor PDQ