1, before nipple plastic surgery, if the patient has severe breast hyperplasia or tumor;

2. Patients with psychological disorder or mental illness before nipple plastic surgery;

3. Patients with cardiac and renal insufficiency before nipple plastic surgery;

4. Patients with endocrine system diseases before nipple plastic surgery

5. Before nipple plastic surgery, it has been confirmed that the patient has a scar constitution;

6. Local examination before nipple plastic surgery to ensure that there is no skin inflammation in the breast;

7. Stop using birth control pills, vitamin E drugs or aspirin painkillers three weeks before nipple plastic surgery, and have anticoagulant drugs to prevent wound healing and increase intraoperative bleeding;

8. Quit smoking for one week before nipple plastic surgery;

9. Stop taking supplements and drinking alcohol within 24 hours before nipple plastic surgery.