If you gargle salt water every day, you may prevent infections of the upper respiratory tract. It doesn’t stop to be useful even if you are already sick: gargling salted water helps to reduce the violence of cold symptoms. For instance, it may soothe nasal stuffiness and throat pains.
Salted water gargling helps people because it cuts down and easies mucus that is full of allergens and bad bacteria. All you have to do is to put one teaspoon of salt into a glass of warm boiled water, and mix until it all is dissolved. Than gargle the solution for as long as you can, and spew it out. Repeat a few times for better effect.