Exposed nostrils may be caused by trauma, congenital developmental problems, etc., and can be improved through debridement and suturing, surgical repair and other methods. 1. Trauma: If the nostril is exposed due to trauma, the patient needs to go to the hospital in time for debridement and suture, suture the exposed nostril, keep the area clean and dry, and change the medicine regularly for review. 2. Congenital developmental problems: If the nostrils are big, it will lead to exposed nostrils, which can be improved by nose reduction surgery; if the nostrils are exposed due to the short nose, you can choose to extend the nasal columella surgery to improve the shortening of the nasal columella, and to reduce the exposure of the nostrils. For those with exposed nostrils, if you need to improve the situation, you should visit a regular medical institution and choose the appropriate way under the guidance of a physician.