Depending on the size of the blister, if the blister is small, it can be absorbed naturally without suction, but if the blister is large, it needs to be suctioned off with a syringe because it is difficult to be absorbed by itself. The specific operation is to disinfect the surface of the blister and the surrounding skin with alcohol, use a syringe needle from the side of the blister into the needle as far as possible to completely pump out the blister fluid, and then pierce the skin of the blister on the opposite side, with gauze dressing pressure bandage can be. Small blisters can use warm water to soak the feet to promote absorption by activating the blood.