Blisters caused by foot friction can usually subside in 5-7 days at the earliest if they are not picked. Repeated friction of the feet easily formed blisters belong to friction blisters, is due to repeated friction of the local skin, resulting in cracks between the epidermal cells, the later cracks gradually expand, the epidermal layer appears to loosen, thus showing the symptoms of blisters. This friction blister can be absorbed by the body itself, and will gradually shrink and fade at a later stage. Usually smaller blisters are absorbed more quickly, the absorption of larger blisters is relatively slow, the fastest can be in about 5-7 days to subside. In order to avoid friction blisters on the feet, usually try to wear more comfortable shoes and socks. Larger blisters can choose a sterile syringe to extract the blister fluid, and then iodophor gauze pressure bandage. If the blister accidentally breaks later, topical iodophor or antibiotic ointment can be applied to avoid local infection.