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After skin injury, wound healing and scar treatment has become the pain point of patients and the focus of medical workers. We need to clarify the normal procedure of wound healing, give appropriate treatment at different stages and maintain the normal procedure of wound healing, so as to reduce the formation of scar and relieve the pain of patients. This paper briefly reviewed the procedure of wound healing and summarized the current situation and existing problems of clinical wound healing and scar treatment. We expect that in the near future, more and more new technologies will be applied for different stages of wound repair, so that the wound will heal without scars.