what is sheer friction blisters
Friction blisters occur when there is contact, pressure and movement between the skin and something touching it â such as a heel rubbed by a new shoe.Shear forces cause mechanical separation of the outer layers of skin, the epidermis.The gap fills with fluid forming a subepidermal bulla (blister). Blisters form more quickly if pressure and movement on the skin is severe or the skin is damp.riction blisters. Friction blisters are common and uncomfortable, affecting males and females of all ages. They often affect the feet, but may also affect the hands or any site.