Sea salt water nasal spray has many functions: 1, clean up the nasal cavity, wetting nasal secretions or internal crusts to facilitate removal; 2, has antibacterial and bactericidal effects, playing a controlling role in nasal inflammation; 3, has an anti-allergic and dilution of allergens, which is also helpful in allergic rhinitis; 4, can reduce edema and improve the feeling of nasal congestion and discomfort. Sea salt water nasal spray has an auxiliary therapeutic effect on rhinitis or allergic rhinitis, but still cannot replace medication. It has the advantage of being unrestricted for people who have restrictions on the use of drugs, such as pregnant women or younger children, because this medicine basically does not contain drugs or preservative ingredients.