At present, it is considered safe and convenient treatment to flush the nasal cavity with saline. It is usually used for the adjuvant treatment of rhinitis and sinusitis, and is recommended by the domestic and foreign diagnosis and treatment guidelines for the treatment of rhinitis and sinusitis.

There are three aspects of nasal washing with salt
1. Eliminate excess secretions and allergens in the nasal cavity;
2. Keep the nasal cavity moist;
3. Promote nasal mucosal cilia, accelerate the removal of mucus and inflammatory substances, and reduce mucosal edema.

Eight points of attention when flushing
1. When rinsing the nasal cavity, use the buffered salt solution in the prepared salt packet instead of purified water, because the water and the nasal cavity environment are physiologically isotonic, which is not conducive to maintaining the stability of the nasal cavity environment;
2. Dissolve the salt packet with boiling water, do not use tap water directly. In the United States, there are cases of direct use of tap water to infect amoeba.
3. Avoid using cold or hot normal saline to rinse the nose. Too cold or hot will irritate the nasal mucosa and damage it. At present, there is no conclusion on the temperature requirement. It is generally considered to be close to body temperature, 40 degrees Celsius higher;
4. Before rinsing, remember to blow your nose gently to remove the nasal scab to prevent the nasal scab from rushing deeper into the nasal cavity.
5. Excessive pressure can easily cause damage to the nasal cavity and ears. Therefore, if the nasal cavity is completely blocked, it is not suitable for irrigation; if there is an ear infection, it is not suitable for irrigation.
6. Do not forcefully squeeze the rinse bottle during rinsing. The movements should be gentle, so as not to damage the nasal mucosa or ears due to excessive pressure. At the same time, remember to breathe through your mouth when rinsing, do not hold your breath;
7. Flush before going out or one hour before going to bed. Do not go out or go to bed after washing, the salt water in the nasal cavity often flows back to the throat, affecting sleep and work. Therefore, after rinsing, be sure to bend over and lower your head to your knees a few more times to control the residual saline in the nasal cavity as much as possible;
8. The number of cleanings per day depends on the specific situation. It is recommended to rinse 1-2 times a day. The amount of saline used for each flush should not exceed 300ml. Excessive flushing of the nasal cavity can also cause damage to the nasal mucosa.