As part of the surgical routine, the surgeon prepares the hair in the appropriate area according to the design of the surgical incision. After the surgeon determines the surgical plan, a “preoperative order” is issued and the nurse performs it or leaves it to the patient. In the midst of the complicated clinical work, the preoperative preparation of the skin seems to be a minor task, but this does not negate its importance. After so many years as a clinician and so many surgeries, have you ever thought about the simple issue of skin preparation? Local shaving, also known as preoperative “skin preparation” is referred to as “skin preparation”. The main purpose of skin preparation is to prevent surgical site infection (Surgical Site Inection, SSI) or to prevent surrounding hair from entering the incision. Because the hair area may contain some bacteria, early surgeons believed that disinfection after hair removal would be effective in sterilizing the area and thus reduce postoperative infections. Researchers began studying the methods, effectiveness, and necessity of skin preparation as early as the 1960s. The main methods of skin preparation used today are: razor shaving, chemical hair removal with depilatory cream, scissor cutting, etc. The “three axes” of skin preparation have been summarized and reviewed in a number of META analyses over the last decade. French researchers analyzed 19 randomized controlled studies of preoperative skin preparation and found that patients who shaved before surgery were more likely to develop surgical site infections than those who did not shave or used depilatory creams and trimmings. This is because during the shaving process, the razor may scratch the skin to form tiny wounds through which bacteria can infect the surgical site. Six years ago in a tertiary hospital in Anhui Province because of razor contamination caused an outbreak of Klebsiella pneumonia in seven neurosurgery patients. And another British researcher statistically concluded that although there was no statistical difference in the likelihood of postoperative incisional infections with shaving, clipping and no hair removal, the rate of SSI with hair clipping was still lower than with razor shaving application. Although these studies suggest that whether or not hair is removed from the surgical area has no effect on surgical site infections, preoperative skin preparation is still widely performed in clinical practice. This is because many surgeons believe that hair can obstruct vision, interfere with the operation, fall into the incision or prevent the dressing from adhering. If your patient has a Guinness Book of Records, this hair needs to be “carefully” organized. Currently, the skin preparation related to our plastic surgery mainly includes: hair around the ear before ear surgery, especially ear deformity reconstruction surgery; hair in the nostrils during nasal surgery; hair treatment during wrinkle surgery or hair transplantation; axillary hair during axillary surgery or buried expander or breast augmentation surgery through the axilla; pubic hair treatment during perineal surgery, etc. In the Technical Guidelines for the Prevention and Control of Surgical Site Infections (Implementation) issued by the National Health Planning Commission in 2010, it is proposed that the skin at the surgical site should be prepared correctly and the surgical incision site and surrounding skin should be thoroughly cleared of contamination. Pre-operative skin preparation should be performed on the day of surgery, and when it is necessary to remove surgical site hair, methods that do not damage the skin should be used to avoid scraping the hair with a blade. Therefore, in clinical work, we should avoid unnecessary skin preparation as much as possible: for example, when doing facial wrinkle surgery, only about 1 cm of hair around the incision is subtracted, and the other hair is tied into pigtails; if the surgery is done on the chest or head, it is not necessary to prepare the skin on the perineum, instead of simply and roughly “shaving it all”; and as much as possible, use the skin preparation method. If the procedure is performed on the chest or head, it is not necessary to prepare the skin of the perineum, instead of simply and roughly “shaving it all”; and scissors are used instead of razors whenever possible. This improves skin preparation in order to obtain the cleanest surgical view with the least damage and to prepare for surgery.