Nasal rinsing, called jala neti in yoga, means flushing salt water through your nasal passages with a neti pot or squeeze bottle. A Cochrane review found large-volume salt-water rinsing may improve symptoms of chronic sinusitis, though the evidence is limited. The one rule that matters: never use plain tap water. Use distilled, sterile or boiled-then-cooled water. In 2011, two people in Louisiana died from a rare brain infection after rinsing with tap water that contained a dangerous amoeba.
- SymptomBlocked, stuffy, irritated sinuses
- Before thatThick mucus, allergens and irritants stay trapped
- Before thatThe nose's natural clearing system is overwhelmed
- RootInflamed lining that can't clear itself fast enough
An ancient cleansing practice
Jala neti, "water cleansing", is one of the shatkarmas, the traditional cleansing practices of hatha yoga, closely linked to Ayurveda. You tilt your head, pour lukewarm salt water into one nostril and let it flow out the other, carrying mucus, dust and allergens with it.
What sounds like folk medicine is now standard advice from many ear, nose and throat doctors.
Why it works
The inside of your nose is lined with a thin layer of mucus and tiny hair-like structures called cilia that sweep particles away, like a conveyor belt. When the lining is inflamed, from allergies, infections or chronic sinusitis (long-lasting inflammation of the sinuses), mucus thickens and the belt slows down. Rinsing with salt water thins the mucus, flushes out irritants and helps the belt get moving again.
What the evidence shows
A Cochrane review, one of the most rigorous types of evidence summary, looked at salt-water rinsing for chronic sinusitis. In the main trial, people who rinsed with a large volume (150 ml) of slightly salty water each day had better symptom and quality-of-life scores at three months, and more so at six months. The reviewers rated the evidence as low certainty, because there were only two small trials with limitations, and about a quarter of rinsers had minor side effects like nosebleeds.[1] Our grade: a modest benefit, low risk when done safely.
The one rule: safe water
In 2011, two people in Louisiana died after using neti pots filled with their home tap water. The water contained Naegleria fowleri, a rare amoeba that can travel from the nose to the brain and cause a deadly infection. Investigators found the amoeba in both homes' tap water.[2]
Drinking that same water is harmless, because stomach acid kills the amoeba. The nose offers no such protection. And adding a ready-made salt packet doesn't make tap water safe: in the investigators' tests, the salt mix didn't kill the amoeba.[2]
It's just salt water, so any water will do.
Tap water can carry rare but deadly microbes. Always use distilled, sterile or boiled-and-cooled water.
How to rinse safely
- Water: distilled, sterile, or tap water boiled for at least 1 minute (3 minutes at high altitude), then cooled to lukewarm.
- Salt: use ready-made saline packets, or non-iodized salt with a pinch of baking soda, as directed by the device.
- Technique: lean over a sink, tilt your head sideways, breathe through your mouth and pour into the upper nostril.
- Clean the device after every use and let it air-dry.
- See a doctor if symptoms last more than 10 days, you have a fever, or rinsing causes pain or nosebleeds.
The bottom line
Jala neti is one of the Ayurvedic and yogic practices that modern medicine has embraced: a cheap, simple way to ease chronic sinus symptoms. Its single non-negotiable rule is safe water. Follow it, and this is one ancient practice worth keeping. For more traditional practices put to the test, see Ayurveda and longevity.
Frequently asked questions
What water should I use in a neti pot?
Use distilled or sterile water from a store, or tap water that has been boiled for at least one minute (three minutes at high altitude) and cooled to lukewarm. Never use water straight from the tap.
How often can I rinse my nose?
Many people rinse once or twice a day during symptoms. Daily long-term use is common for chronic sinus problems, but talk to your doctor if you need it constantly.
Does nasal rinsing help with colds and allergies?
It can wash out allergens and thin mucus, and many people find it soothing. The strongest evidence is for chronic sinusitis; evidence for colds and allergies is more limited but generally positive.
Can you get sick from tap water in your nose but not by drinking it?
Yes. The amoeba Naegleria fowleri is killed by stomach acid when swallowed, but can reach the brain through the nose. That's why drinking tap water is safe, while rinsing your nose with it is not.
Sources
- Chong LY, et al. Saline irrigation for chronic rhinosinusitis. Cochrane Database of Systematic Reviews, 2016.
- Yoder JS, et al. Primary amebic meningoencephalitis deaths associated with sinus irrigation using contaminated tap water. Clinical Infectious Diseases, 2012.