The surgical methods of alar reduction are usually divided into internal incision and external incision. External incision alar reduction is suitable for people with obviously enlarged alar width, which can effectively improve the alar width. For people with slightly larger alar width and thicker alar, we can choose internal incision alar reduction, which can effectively improve the problem of nostril asymmetry, make the alar fossa shape obvious and the tip shape more exquisite.