The appearance of wide nose wing is related to genetic factors and bad habits in peacetime. Usually avoid picking your nostrils and other bad habits. To narrow the nostril, generally speaking, only plastic surgery is done, the upper part of the nasal vestibule or the lateral base of the nasal alar is cut, the alar margin is secretly separated, and a cavity for containing the implant is separated between the external nasal skin and the vestibular skin. An oval or rectangular cartilage was cut above the lateral foot of alar cartilage, and the implant was implanted in a cavity separate from the upper contracted alar.