All nasal sprays work, and they work quite well. Nasal glucocorticosteroids are currently the most widely used. Oral antihistamines for allergic rhinitis, along with nasal glucocorticosteroids, will soon bring the symptoms under control. After the symptoms are controlled, it is not the end of the treatment, because if the medication is stopped immediately, the symptoms of allergic rhinitis will appear again very soon and the disease will recur. Since oral medications cannot be taken for a long time, they are usually taken for 3-4 weeks. Now the main maintenance of symptoms rely on nasal glucocorticosteroid maintenance nasal spray, can be sprayed for at least 1 month, if the symptoms disappear after 1 month, you can spray less, can be 1 day 1 time or every other day 1 time spray can be. Asthma patients even have to spray for 3-6 months, 6-9 months are needed, so the nasal spray is certainly useful.