Wounds take about 3 days to 3 weeks to scab over, depending on how well they heal. Generally sterile wounds heal relatively quickly and infected wounds heal more slowly. Sterile wounds, such as surgical incisions, fresh and uncontaminated wounds, wounds without infection after debridement treatment, etc., have good wound healing ability, and most of them can heal in one stage, and scabs can be formed in about 3 days. Infected wounds, if the wound once infected pus formation of abscess, need to do wound drainage, wound healing time is delayed, most of the need for 2~3 weeks to gradually improve to scab. When there is a wound, pay attention to keep the wound clean and dry, try to disinfect on time to avoid infection, in order to make the wound scab as soon as possible, a phase of healing. Once there is a wound, go to the hospital in time, let the doctor clean and disinfect the wound and carry out standardized treatment.