If rhinoplasty is performed with comprehensive rhinoplasty, rhinoplasty and rhinoplasty, the separation area may be larger, the blood leakage and trauma are larger, and if no drainage is placed after the incision is closed, the accumulated blood may not be discharged, which may easily cause hematoma, which will affect the wound and cause infection. The purpose of placing drainage is mainly to drain the fluid and blood accumulated in the separated nasal cavity and drain it out in time, which is more conducive to wound healing and tissue swelling. If the hematoma is not cleaned, it may be muscularized later and have an impact on the wound. After placing drainage, drainage tube extraction time to observe the drainage flow, if the daily drainage flow is a lot, to delay the extraction time; drainage flow is very little can be considered extraction, generally 48-72 hours after the extraction of drainage tube.