Allergic rhinitis is a disease that cannot be cured at present, unless it is accompanied by a clear anatomical deformity that requires surgical treatment. Even after functional nasal endoscopic surgery to correct the anatomical deformity of the nose, nasal irrigation and medication are still needed for a longer period of time. The author has been practicing medicine for more than 30 years and has observed the use of warm saline rinses in the treatment of patients with allergic rhinitis since 1992, and since then there have been more than 10,000 cases, none of which have been effective in relieving allergic symptoms. From the initial practice of letting patients inhale saline through the nasal cavity, to the middle stage of suggesting patients to use syringes for rinsing, until the emergence of various professional rinsing tools in the past 10 years, it has greatly facilitated the use of patients. Better adjunctive therapeutic effects have also been obtained. So why do patients with allergic rhinitis need nasal rinsing? How do you do it? What are the things that need to be paid attention to? 1. Why do patients with allergic rhinitis need nasal rinsing? The main functions of nasal rinsing are: ① Physical or mechanical removal of nasal secretions to partially restore the nasal ventilation function. ② Washing away excessive nasal secretions facilitates the absorption of nasal spray anti-allergy drugs. ③Reduces allergens and inflammatory factors produced by allergic reactions. ④May reduce nasal mucosal edema. ⑤ Improve the ciliary motility of the nasal mucosa to restore the function of the nasal mucus-cilia clearance system. 2.What kind of saline is good to use for nasal rinsing? If you don’t understand the details, it will end up being counterproductive instead. Until now, some patients still mistakenly believe in the wrong method and use tap water to rinse the nasal cavity, which may have harmful effects on the nasal mucosa. It is recommended to use sterilized topical or sterilized injectable saline, one is clean and the main thing is the right concentration. 0.9% saline is the most suitable solution for nasal cilia, which facilitates the oscillation of nasal cilia, and normal nasal cilia movement is an important sign of normal nasal cavity function. Low concentration of saline will cause more damage to the mucosa of the nasal cavity and will destroy the ciliary tissue. Too high concentration will also cause damage to the nasal cilia. Therefore, 0.9% saline is commonly used to rinse the nasal cavity in clinical practice. 3.What kind of people can use high concentration saline (not more than 2%) and what kind of people cannot use it? The effect of high concentration saline comes quickly, but it has certain side effects. Generally, it should not be used for more than 7 days. In general, patients with nasal congestion can consider using high concentration saline appropriately because it has a faster effect on swelling and can solve some nasal congestion symptoms more quickly. But no nasal congestion, or nose is very dry people should not use high concentration saline, not only does not work but may aggravate the nasal symptoms. 4, it is best to heat the saline before use, so that the effect will be better, the nasal cavity is not stimulated, more comfortable to use. The temperature of the saline is controlled at about the same temperature as the human body, by hand, without being very accurate, and be careful not to burn. Especially for allergic rhinitis patients this is very important, there are many allergic rhinitis patients are very sensitive to changes in hot and cold temperature, if the saline temperature is low but will aggravate the symptoms. 5, it is best to use special nasal rinse tools, there are already a variety of professional nasal rinse tools in China. The main difference between these tools is in the effect of cleaning, some can reach more parts of the nasal cavity, some less, and the final therapeutic effect produced by them also has some differences, but not very big. If not, a 20ml syringe can be used instead (not recommended). Of course, nasal irrigation alone is not enough for allergic rhinitis, and the “Guidelines for the diagnosis and treatment of allergic rhinitis” developed by the “Conference on Nasal Infections and Allergic Reactions” in 2008 and ’12 emphasize standardized and comprehensive treatment. If there is a clear anatomical abnormality, it is recommended that the anatomical abnormality should be resolved first and then standardized anti-allergic treatment should be given if necessary.