Skin abrasions are open abrasions, which means that the skin or mucous membrane of the injured area is ruptured, the wound is connected to the outside world, and there is often tissue fluid and blood flowing from the trauma. The principle of treatment is to stop bleeding and treat the wound in a timely manner, prevent infection, stop bleeding first and then treat the wound. Some common open soft tissue injuries are abrasions, cuts, puncture wounds and lacerations. Abrasions are characterized by shallow wounds, small area, generally caused by external forces, such as blunt instruments (slightly rough) the role of mechanical force friction, resulting in epidermal peeling, rolled over as the main performance of the injury, the most common is the palm of the hand, elbow, knee, calf skin abrasions, can be manifested as scratches, abrasions, impact marks, indentations, pressure scrapes, etc., the injury is minor, but can reflect the point of violence, the direction of violence, the intention to inflict violence and Injury characteristics, etc. In the sliding direction of the friction surface to form a fine and shallow plow marks type of damage. Abrasions are superficial abrasions of the skin. After the abrasion, the epidermis is broken and the wound surface appears pale, with many small bleeding spots and tissue fluid exudation. Because the dermis is rich in nerve endings, the injury is often very painful, but the regenerative capacity of epidermal cells is very strong, if the wound is not infected, it heals quickly and can not leave a scar. If the abrasion site is shallow, only need to apply red saline can, such as abrasion trauma is dirty or oozing blood, the application of saline clean wound and then coated with red or purple saline. Lacerations, lacerations of the head are the most common, mostly due to the oblique or tangential direction of violence on the scalp, the torn scalp is often lingual or flap-shaped, often with a tip connected to the head. Scalp lacerations are generally not associated with skull and brain injury, but not always, and occasionally there are skull fractures or intracranial hemorrhages. These patients lose more blood, but rarely to the extent of shock. When the wound is small, it can be treated by disinfection and then glued with adhesive paste or band-aids. For larger wounds, the bleeding should be stopped and the wounds should be sutured. In severe cases, tetanus antivenom should be administered and antibiotics should be given.