It is common for blisters to result from prolonged friction caused by shoes that are not suitable for the foot's shape or for the physical activity being performed. It is recommended to prevent blisters by choosing appropriate footwear for the foot or activity. Once a blister forms, it should be protected with a cushion to prevent pressure and friction, and it will usually heal on its own. If the blister bursts, the wound should be cleaned, an antibiotic ointment applied, and covered with a bandage. These cushioned bandages can be purchased at a pharmacy. If they do not stay in place, thicker socks or wearing two pairs of socks could be tried, although this may cause more heat accumulation.