Blowing your nose and washing your face will stimulate the nasal mucosa and induce exudation of erosive mucosa. It is suggested that otorhinolaryngology should examine the nasal cavity to exclude the possibility of new organisms in the nasal cavity, and routine coagulation function examination should exclude the possibility of abnormal blood components. If it is only nasal mucosa erosion, moisten it with compound mint nasal drops and squeeze the disease with gel to promote healing.