Hello, 1, failed to choose the right hospital and doctor. External canthus surgery seems simple, but in fact, it requires high technical requirements and aesthetic ability of doctors. The effect of the operation has a great relationship with the doctor's technical level and surgical principles. 2. Did not fully communicate with the doctor before operation. People with scar constitution are not suitable for external canthus surgery, because this constitution is easy to leave scars after surgery, and once the canthus leaves scars, the surgery is not only ineffective, but also may lead to disfigurement, so the doctor will ask the beauty seeker about his physical condition and do relevant physical examination before surgery. 3. Postoperative care is not done well. Postoperative nursing affects the surgical effect. Once the incision is inflamed, it will seriously affect the health of the eyes.