The injury of nasal mucosa surgery has not healed. Due to the slow healing of mucosa, the blood vessels and nerves under the mucosa are easily stimulated by the outside world and bleed and ache. It is recommended to continue taking anti-inflammatory drugs to prevent infection. Wearing a mask can effectively avoid nasal irritation, and taking vitamin C orally can help mucosa grow and prevent bleeding. Drink plenty of water and fruits to avoid dry air and flying dust irritating the nasal cavity.