The difference between skin flap and skin graft mainly lies in the differences in the selection of tissues, treatment of diseases, and postoperative recovery. 1. Selection of tissues: a skin flap is a tissue flap with blood vessels, skin, and subcutaneous tissue; a skin graft is simply skin. 2. Treatment of diseases: skin flap is mainly used to repair the exposed parts such as tissues or tendons due to trauma, surgery, etc., which requires a second surgery; skin graft is mainly used for local skin defects, which usually does not require a second surgery. 3. Post-operative recovery: the flap has good elasticity and sufficient blood flow and tissue volume after surgery, so the patient recovers faster after surgery and has less discomfort; skin grafting relies on the surrounding tissues, capillary proliferation and other aspects of trauma repair, and the degree of recovery is relatively slow. Therefore, it is recommended that patients should choose the appropriate treatment plan under the guidance of the doctor if they have any uncomfortable symptoms.