Although the medical cosmetic surgery industry has been highly developed nowadays, medicine is still an empirical science, there are imperfections and some problems cannot be solved perfectly. 1, plastic surgery, like any other surgery, there are certain risks, such as anesthesia accidents, drug allergies, surgical accidents and post-operative complications may occur. Doctors will make adequate preparations before surgery to minimize the chance of surgical risk, but patients should also be psychologically prepared for this. 2. Patients should provide a truthful medical history, such as scarring, diabetes, heart disease, high blood pressure, kidney disease and mental anomalies and other problems. 3.Patients should strictly follow the doctor’s instructions and go to the hospital in time if there are any abnormalities such as redness, swelling, heat and pain after the surgery. 4, scar and its swelling excision surgery can not be completely removed, but only appropriate improvement, the actual incision may be beyond the scope of the original scar. 5.According to the nature of the lesion, the incision is larger than the lesion area, and there is a possibility of recurrence after surgery. 6. If the nature of the lesion is malignant or has been malignant, it may need to be operated again after the results of pathologic examination are returned. 7.After scar surgery, serial treatments should be carried out according to the doctor’s instructions, such as laser, injection, the use of anti-scarring topical drugs.