The traditional technique of using warm salt water to flush out your nose—called nasal lavage (luh-VAHZH) or irrigation—can be an effective way to help people who suffer from chronic sinus infections.

Nasal lavage is thought to work by helping remove allergens, mucus, and bacteria from the nose and sinuses, decreasing swelling and improving airflow. One recent study showed that it appears to be more effective than saline spray for providing short-term relief for chronic nasal and sinus symptoms.

You can make your own saline wash or buy premixed kits. For one use, mix 8 ounces of water, 1½ teaspoons of salt (noniodized salt reduces irritation), and ¼ teaspoon of baking soda in a clean bowl. You can use a “neti pot,” which looks like a small teapot, or you can use a bulb syringe or squeeze bottle to rinse one nostril at a time.

Talk with your doctor before doing nasal lavage to be sure you do it correctly. It’s usually as simple as leaning over a sink or standing in the shower, tilting your head, and gently squirting salted water into one nostril at a time until mucus is cleared.