Moleskin or sticky bandages should be used to common blister sites, such as your heels. To minimize dampness, apply foot powder or antiperspirant. To disperse friction, wear two pairs of socks. Apply petroleum jelly to regions of high friction. Do not pop blisters - only medical professionals can do this safely. Dry heat or cold can also relieve the pain of a blister. Soaking your feet in water that is too hot or cold can cause additional injury. The best way to treat a blister is by keeping it clean and dry. Avoid walking on it until it has healed completely.