1, as a kind of surgery, the doctor will make the best efforts, but due to the injection site, as well as the nature of the injected material and the depth of the level is different, the personal experience of the surgeon and the limitations of the modern medical level, may not be able to achieve complete satisfaction of the patient and complete removal. At the same time, due to the damage caused by illegal injection materials to the skin tissue is relatively large, it is possible to remove the site of the depression or unevenness and so on. 2, the patient should strictly follow the doctor’s instructions, if there are abnormalities, you need to go to the hospital in time for follow-up, so that the doctor can properly deal with it. 3, injection material removal requires a recovery period, according to the individual’s age, physical condition and surgical trauma, the recovery time is different, usually takes 3 to 6 months, individuals need more than a year of recovery, the patient should be fully prepared psychologically. 4, the patient should truthfully provide a medical history, such as scars, diabetes, heart disease, high blood pressure, kidney disease or mental anomalies. 5, menstruation, pregnancy, lactation is not suitable for surgery. 6.Surgery is a kind of traumatic treatment, due to the injection of materials on the skin corrosion and individual differences and many other factors, intraoperative and postoperative complications may occur. Anesthesia accident, drug toxic reaction, allergic reaction, cardiovascular accident, cardiac arrest and so on. Intraoperative bleeding, postoperative hematoma, seroma, the possibility of reoperation exists. Postoperative infections, leading to prolonged course or even reoperation. The incision may form hyperplastic scar. It is not possible for both sides to be completely symmetrical and consistent after surgery. Due to the different nature of the injected materials, it is impossible to remove them completely. In particular, growth factor injections require multiple surgeries.