Skin preparation is the preoperative preparation of the patient’s skin in the surgical area, the purpose is to eliminate bacteria on the surgical incision and the skin around the incision to prevent infection. The specific practice is generally first with a soft brush dipped in warm soapy water, wash the local skin, shave the surface of the skin with a razor hair. Be careful not to damage the skin, and then wash with warm water. If there is a lot of grease on the skin or remnants of adhesive tape sticking, use a cotton swab dipped in gasoline or turpentine to clean it. Dirt from the umbilicus of abdominal surgery can also be removed by applying gasoline or turpentine. Generally shave the hair the day before surgery, for pediatric skin preparation do not shave the hair, only do the treatment of local cleaning. Also shaving should be done in the direction of hair growth to avoid damaging the skin.