Contact dermatitis such injuries are mainly on the hands of the skin damage. Light, resulting in dry skin, peeling, itching, severe swelling, blisters, herpes, scarring. This injury is caused by long-term exposure to acid, alkali aqueous solution, detergents, disinfectants, or exposure to toxic chemicals, biological substances, suffering from electric shock, frostbite, high temperature scald, flame burns and so on.