The pedicled flap should be observed 1 week after pedicled. There is no necrosis at the skin edge, no abnormal color and no obvious swelling, so it can be judged that the flap survives well. The whole process takes 1 month, and the interruption takes 3 weeks. Free flap should be observed for 2 weeks without necrosis, abnormal color and obvious swelling, so it can be judged that the flap survived well. It is necessary to ban smoking during treatment. Nicotine can cause strong vasoconstriction, which seriously affects the survival of skin flap.