Natural treatments for runny noses include irrigating nasal passages with a salt solution to rinse the sinuses of excess mucus and bacteria, according to WebMD. Using a nasal spray and adding moisture to the air with a humidifier or a vaporizer can relieve symptoms as well.
A runny nose occurs when the body produces excess mucus because of a cold, allergies or sinus infections, and it comes out of the nostrils, explains WebMD. Homeopathic treatments to relieve symptoms include taking Allium cepa and Natrum muriaticum, reports the American Association of Naturopathic Physicians. Allium cepa is a garden onion, notes the U.S. Department of Agriculture. Natrum muriaticum is sea salt, according to Hyland's.