Contusions and contusions are still very different, contusions are only the superficial layer of the skin is damaged, the wound is usually attached with mud and sand, is due to the skin and the ground after the friction caused by the wound. Contusion wounds are large and shallow, while contusion wounds are large and deep, and contusion wounds are deeper. In addition to damage to the surface of the skin, the wound will also be torn in the deeper layers of the skin, and there is a difference in the treatment of the two wounds. When dealing with contusion wounds, you only need to clean the wound with iodophor or alcohol to remove the sediment attached to the wound. When dealing with contusion wounds, in addition to the need to use iodophor and alcohol to simply treat the wound, because of the occurrence of tears, you also need to carry out wound closure.