A nasal wash flushes saline solution through one nostril and out the other, clearing mucus, allergens, and irritants from your nasal passages. It takes about two minutes once you get the hang of it, and the relief from congestion or sinus pressure can be almost immediate. Here’s how to do it safely and effectively.
Why Nasal Washing Works
Saline rinses do more than just flush out visible mucus. The saltwater softens thick, sticky secretions and makes them less viscous, so they drain more easily. It also speeds up the tiny hair-like structures (cilia) lining your nasal passages, helping them sweep mucus toward the back of your throat where it can be cleared naturally.
Your nasal mucus contains inflammatory compounds like histamines, prostaglandins, and leukotrienes that ramp up swelling, congestion, and drainage when you’re dealing with allergies or a sinus infection. A saline rinse physically washes these compounds out, which is why symptoms often improve quickly after a single wash. Regular rinsing also disrupts bacterial biofilms, reduces swelling in the nasal lining, and keeps the mucus layer hydrated so it functions properly.
Use Safe Water Every Time
This is the single most important rule: never use plain tap water. Although extremely rare, people have died from rinsing their sinuses with tap water containing a brain-infecting amoeba called Naegleria fowleri. The CDC recommends using only:
- Store-bought distilled or sterile water (the label will say “distilled” or “sterile”)
- Boiled and cooled tap water, brought to a rolling boil for at least 1 minute (3 minutes above 6,500 feet elevation), then cooled to lukewarm
- Filtered water passed through a filter designed to trap infectious organisms
If you boil water in advance, store it in a clean, sealed container and use it within 24 hours.
How to Make the Saline Solution
Mix the following in a clean container:
- 8 ounces of safe, lukewarm water
- ¼ teaspoon iodine-free salt (kosher or pickling salt works well)
- ¼ teaspoon baking soda (not baking powder)
The baking soda buffers the solution to a slightly alkaline pH, which is gentler on your nasal lining and better for cilia function. If you skip the baking soda, the rinse can sting. The salt should be iodine-free because iodine can irritate the nasal passages. You can also buy pre-measured saline packets at most pharmacies, which take the guesswork out of mixing.
The solution should feel warm, not hot, roughly body temperature. Too cold and it’s uncomfortable. Too hot and it can damage delicate tissue.
Choosing a Device
The three most common options are neti pots, squeeze bottles, and powered pulsating irrigators. They all work, but they differ in how much saline actually reaches your sinuses.
Research comparing squeeze bottles to pulsating devices found that squeeze bottles consistently delivered better irrigation to the maxillary sinuses (behind your cheeks), frontal sinuses (behind your forehead), and sphenoid sinuses (deeper in your skull). The squeeze bottle’s gentle, user-controlled pressure pushes saline further into the passages than gravity-fed neti pots or battery-powered pulsers. For most people dealing with congestion or sinus symptoms, a simple squeeze bottle is the most effective and affordable choice.
Neti pots rely on gravity alone, so they deliver a gentler flow. Some people prefer that, especially if they find squeeze bottles too forceful. Powered irrigators can be helpful for people with limited hand strength.
Step-by-Step Instructions
Fill your device with the freshly mixed saline solution and stand over a sink.
Lean forward, looking down at the drain. Tilt your head to one side so one ear points toward the sink and the other toward the ceiling. A helpful way to think about it: imagine you’re listening for a sound coming from the drain. This angle lets water flow in through your upper nostril and out through the lower one.
Breathe through your mouth the entire time. This is important. Mouth-breathing prevents the solution from draining into your throat and keeps you from feeling like you’re choking. Place the tip of the bottle or neti pot snugly into your upper nostril, forming a gentle seal. Squeeze the bottle steadily (or tilt the pot) so the saline flows in. You’ll feel it trickle through your nasal passages and pour out of your lower nostril into the sink.
Use about half the solution on one side. Then switch: tilt your head the other way and repeat through the opposite nostril. When you’re done, gently blow your nose to clear any remaining solution. Don’t blow forcefully, as that can push fluid into your ear canals.
Some water may trickle out of your nose for the next 15 to 30 minutes, especially if you bend forward. This is normal.
How Often to Rinse
For active symptoms like a cold, sinus infection, or allergy flare, once or twice daily is typical. Many people rinse in the morning and again before bed during their worst days, then taper to once daily as symptoms improve.
For chronic sinus problems, daily rinsing is a standard recommendation. Clinical guidelines for chronic rhinosinusitis list nasal irrigation as a primary treatment, not just a complement to medications. Some people maintain a once-daily habit long term and find it reduces the frequency and severity of flare-ups. Others use it only seasonally or when they feel congestion building.
Cleaning Your Device
Rinse the bottle or neti pot with safe water (distilled, sterile, or previously boiled) after every use. Never rinse it with tap water and then use it again without proper cleaning. Let the device air-dry completely between uses, ideally upside down on a clean towel.
The FDA recommends replacing squeeze bottles regularly, as bacteria can colonize the interior surfaces over time. Most manufacturers suggest replacing them every three months, though you should check the instructions that came with your specific device. Ceramic neti pots last longer but still need thorough washing and drying after each session.
Nasal Washing for Children
Nasal irrigation can be used in children over 6 months of age, since babies younger than that may not have reliable mouth-breathing and cough reflexes. For infants and toddlers, the technique looks different than for adults. The child is positioned on a slight incline (about 30 degrees) with their head turned to one side, and a small amount of saline, roughly 6 milliliters per nostril, is gently sprayed into the upper nostril using a continuous-flow spray device.
For older children who can stand at a sink and follow directions, the process is the same as for adults, just with a smaller volume of solution. Pediatric squeeze bottles with softer tips are available at most pharmacies. The key is keeping the child calm and timing the wash away from meals to avoid triggering nausea.
Common Mistakes to Avoid
Using tap water is the biggest safety error. Even if your tap water is safe to drink, it can harbor organisms that are harmless in your stomach but dangerous in your nasal passages.
Tilting your head back instead of forward sends saline straight down your throat. Keep your chin pointed down toward the sink. Similarly, not tilting your head far enough to the side means the solution pools in one spot rather than flowing through and out the other nostril.
Squeezing too hard can force saline into your eustachian tubes, causing ear pressure or discomfort. Use steady, gentle pressure. If you feel fullness in your ears, ease up and adjust your head position. Blowing your nose aggressively right after a rinse has the same effect. Gentle is the goal throughout the entire process.
Finally, using too much or too little salt makes the rinse uncomfortable. Too little salt (hypotonic) and the solution stings. Too much salt (strongly hypertonic) can cause a burning sensation. Stick to the recipe: ¼ teaspoon each of salt and baking soda per 8 ounces of water.