A saline nasal spray is a mixture of sterile water and 0.9% sodium chloride (salt) that you can spray up your nostrils to flush out pollen, dust, and other allergens from your nasal passages (the ...

Doctors call this the "rebound effect." Saline nasal spray. They're also called "saline" nasal sprays, and you can buy them without a prescription. They loosen up your mucus and keep it from ...