Friction Blisters

In brief Friction blisters are caused by excess frictional trauma to areas of the skin with a thick horny layer and a tight attachment to underlying structures. A moist and/or warm environment promotes blister formation. Blisters are treated by early aspiration of the fluid and by protecting the blister roof. Preventive measures include properly fitting shoes that are broken in slowly, protective padding over potential sites of blister formation, and using drying foot powders and nonslip insoles. Predisposing factors such as certain biomechanical foot defects require correction of the underlying defect and protective padding of blister-prone areas.