This is because electrical burns are much more complex and serious. Ordinary burns are mostly superficial skin tissue damage, and the wound can be healed by ordinary debridement and skin grafting and other procedures. In contrast, electrical burns can reach deep into the blood vessels, nerves, muscles, bones, often have an import, multiple export, and the wound muscle is sandwich necrosis, tissue often secondary necrosis, bleeding, and therefore only through the general skin grafting surgery can not make the wound healing, but through the skin flap transplantation and other complex surgery, in order to make the wound healing and maximize the preservation of limb function, and the surgery often need to be divided into multiple times The surgery often needs to be performed several times, and the treatment period is long, so the cost required is large.