Table salt is a seasoning for daily use and should not be used for nasal cleansing. The main component of table salt is sodium chloride, which also contains iodine and other trace elements, and should not be used directly for nasal cleansing. Nasal cleansing usually use 0.9% concentration of sterile saline, can not be prepared to the standardized concentration of salt, and iodine will stimulate the mucous membrane of the nasal cavity, directly used in the nasal cavity not only fails to achieve the effect of cleansing, but also may cause ciliary dysfunction of the nasal cavity. Saline concentration and plasma osmotic pressure difference, sinusitis, allergic rhinitis and other nasal diseases can be rinsed through the nasal cavity to relieve the symptoms, while the need to follow the doctor’s instructions standardized medication, do not take measures to avoid aggravating the condition.