Shoe Rubbing and Friction
DESCRIPTION
Blisters form when skin rubs against another surface, causing friction. This causes a tear or separation within the upper layers of the skin (the epidermis), forming a space between the layers. The surface is usually intact. Fluid seeps into the space, causing the top of the blister to pop out from the skin surface. The skin directly under the fluid is tender to the touch because it has been abraded.
HOW TO RECOGNIZE IT
Blisters occur mostly on the soles of feet and palms of hands, since the hands and feet often rub against shoes, skates, crutches, tool handles and sports equipment, like tennis racquets.
