Flap surgery is known as skin flap transplantation. Whether or not a failed flap transplantation can be redone depends on a number of factors such as the patient’s general nutritional status, vascular elasticity, and so on. Flap transplantation is simply understood as the selection of one’s own skin and subcutaneous tissue to be transplanted to other parts of the body with skin defects. Failure of flap grafting is usually due to poor vascularization or ischemia of the blood vessels. If the skin defect is severely infected, or if the blood vessels and nerves of the flap are necrotic, the flap will fail. However, if the patient’s own nutritional status is good, there is no local vascularization such as atherosclerosis and infection, and the skin tension is not high in the area supplied by the flap, flap grafting can be considered again. Re-performing the flap grafting still has the possibility of failure. In addition, common complications of flap transplantation include hemorrhagic necrosis, hematoma, infection, and flap avulsion. It is recommended that patients after flap transplantation should eat a diet high in protein, avoid localized pressure, and pay attention to dressing changes and observation.