A skin laceration, an injury to the epidermis or soft tissue caused by impact or collision with a blunt object. The edges of its wound are not neat. It occurs mostly in body impact with hard objects (including person-to-person). It is easily seen in the arch of the eyebrow, jaw, scalp, and face. The magnitude of the impact force is often proportional to the injury. Due to the rich vascularity of the head and face, there is more bleeding if a laceration occurs. When the laceration wound is small, first compress to stop bleeding, clean and disinfect the wound with saline, and then tighten it with butterfly tape. If the larger lacerations, the first should also stop bleeding, and then consider further treatment, such as the site coincides with medical conditions, viable debridement suture and consider injecting tetanus antitoxin, taking antibiotics; if no conditions can be sent to the hospital after the hemostasis. Some accidents caused by lacerations (such as extensive scalp avulsion), trauma is very large, the treatment process is complex, once the site is difficult to deal with, one side of the hemostasis, one side of the organization sent to the hospital for treatment.