Nose stenosis and atresia not only affect breathing. The sense of smell and development will also affect the development of the whole face. Besides congenital factors, nostril stenosis and hemispheric occlusion are mostly caused by acquired factors such as trauma, burn, scald or infection. Narrow or closed anterior nostril, especially cicatricial narrow or closed anterior nostril, needs plastic surgery in appearance, and nostril plastic surgery is a good choice.