Saline nasal cleansing is effective in improving the symptoms caused by rhinitis, but using saline nasal cleansing does not necessarily cure rhinitis completely. Saline nasal cleansing is effective for the most common rhinitis, such as deviated septum, nasal polyps, sinusitis, chronic rhinitis, and turbinate hypertrophy. The principle of saline nasal cleansing is to cleanse the inside of the nasal cavity through the impact of saline. There are a lot of allergens, viruses, bacteria and pus in the nasal cavity, so saline cleaning can also make the nasal cavity present a clean and fresh environment. It also has a restorative effect on the function of the nasal cilia, which can speed up the recovery from rhinitis. When rhinitis patients wash their nasal cavity with salt water, they should pay attention to the temperature, 37° is recommended, do not use cold water, so as not to cause irritation to the nasal mucosa; and is to choose a clean water source, do not use tap water directly, because some bacteria in the water can aggravate the symptoms of rhinitis; in the choice of nasal wash, it is recommended to choose a special nasal wash salt without iodine, it is recommended to wash twice a day. Although saline nasal cleansing can remove nasal secretions and other undesirable stimuli, it should not be used frequently, as this can lead to damage to the normal defense function in the nasal cavity and may aggravate the development of rhinitis. When using saline to cleanse the nasal cavity, care must be taken to avoid using it too often. If the nasal cavity can only relieve the symptoms of rhinitis, it can not play a complete therapeutic role. If the rhinitis is serious, it is recommended to take medication and other methods.