Electrical injury is caused by the mechanical and thermal effects of electric current and other injuries, including electric burns, skin metallization, electric branding, mechanical damage, etc.. 1. Electrical burns: including contact burns and arc burns. Burns can make the skin and subcutaneous tissues and muscles, tendons, nerves, blood vessels and other carbonized state. 2. Skin metallization: high temperature electric arc will make the surrounding metal melt and evaporate, and splash to the skin surface formed, after the skin metallization will make the surface rough, hard, etc.. 3. Electrocautery: after the human body and the electrically charged body contact, not in the case of electric shock, leaving lumps on the skin surface, scarring and so on. 4. Mechanical injury: when the electric current acts on the human body, it leads to injuries such as fracture of body tissues. Once the electrical injury should be promptly to the hospital to receive examination and treatment.