A nasal rinse flushes saline solution through one nostril and out the other, clearing mucus, allergens, and irritants from your nasal passages. The whole process takes about two minutes once you have your solution ready, and it works for congestion from colds, allergies, or chronic sinus issues. Here’s how to do it safely and effectively.
Make Your Saline Solution
The solution matters more than the device. You need two things: safe water and the right salt ratio.
For the water, use distilled water, sterile water (both sold at pharmacies), or tap water you’ve boiled for 3 to 5 minutes and cooled to lukewarm. Never use plain tap water. It can contain low levels of bacteria and amoebas that are harmless when swallowed but can cause serious infections when introduced directly into nasal passages. The FDA has issued specific warnings about this. Boiled water stays safe for 24 hours when stored in a clean, closed container.
For the salt mixture, combine 3 teaspoons of non-iodized salt with 1 teaspoon of baking soda and store it in a small airtight container. When you’re ready to rinse, stir 1 teaspoon of this mixture into 8 ounces (1 cup) of your lukewarm water. This recipe comes from the American Academy of Allergy, Asthma & Immunology and produces a solution that closely matches your body’s own salt concentration, which prevents stinging.
Step-by-Step Rinse Technique
Fill your squeeze bottle or neti pot with the prepared solution. Stand over a sink and tilt your head forward at roughly a 45-degree angle. If you’re using a squeeze bottle, some people also tilt slightly to one side, but a forward lean is the most important part. Open your mouth and breathe through it for the entire rinse. This keeps the soft palate closed so the solution doesn’t drain into your throat.
Place the tip of the device snugly against one nostril. If you’re using a squeeze bottle, gently squeeze. If you’re using a neti pot, let gravity do the work by tilting the pot upward. The solution will flow into one nostril, travel through the nasal cavity, and drain out the other nostril into the sink. Use about half the solution on one side, then switch to the other nostril.
After finishing both sides, gently blow your nose to clear any remaining solution. Don’t blow hard, as this can push fluid into your ears and cause discomfort. Some people find it helpful to lean forward and turn their head side to side to let trapped liquid drain out naturally.
Head Position and Sinus Coverage
A computational fluid dynamics study found that head position significantly affects which sinuses the solution actually reaches. Tilting your head 45 degrees backward was the most effective angle for delivering saline to the deeper sinuses, including the ethmoid, frontal, and sphenoid cavities. For routine congestion relief, a forward tilt works fine. But if you’re dealing with deeper sinus pressure, experimenting with a slight backward tilt during part of the rinse may help the solution penetrate further.
Isotonic vs. Hypertonic Solutions
The standard recipe above produces an isotonic solution, meaning it matches your body’s salt level (roughly 0.9%). A hypertonic solution uses more salt, typically around 3%, and works differently. The extra salt draws water out of swollen nasal tissue through osmosis, which can reduce congestion more aggressively. It also triggers the release of antimicrobial molecules and helps thin thick mucus.
A meta-analysis comparing the two found that hypertonic saline produced a small but statistically significant improvement in nasal symptom scores compared to isotonic. However, it didn’t meaningfully reduce how much allergy medication people needed. Hypertonic rinses are more likely to cause a temporary burning or stinging sensation, especially if you’re new to nasal irrigation. Starting with isotonic is a safer bet. If your congestion is stubborn, you can try adding a pinch more salt, but increase gradually.
How Often to Rinse
When you’re actively congested from a cold, sinus infection, or allergy flare-up, rinsing once or twice a day is standard. Stanford Medicine’s sinus center recommends irrigating each nostril with half a bottle twice daily, noting that more than twice daily is also acceptable during active symptoms.
For prevention, some people rinse a few times per week even without symptoms to keep allergens and irritants from building up. This is safe as long as you’re using properly prepared water and clean equipment each time.
Why Saline Rinses Work
The saline does more than just physically flush out mucus. It decreases mucus viscosity, making thick secretions thinner and easier for your nasal cilia (the tiny hair-like structures lining your nasal passages) to sweep away. The gentle pressure of the flowing liquid also stimulates those cilia to beat more actively, improving your nose’s natural self-cleaning system. After sinus surgery, rinses serve an additional purpose: dislodging blood clots and crusting that can block healing tissue.
Cleaning Your Device
A dirty rinse bottle can introduce bacteria directly into your sinuses, defeating the entire purpose. After every use, rinse the bottle, cap, and any tubing with safe water (the same kind you’d use for the solution itself). Add a few drops of dish soap or baby shampoo, seal the cap, and shake vigorously. Squeeze the bottle hard to force soapy water through the tube and cap. Rinse all parts thoroughly until no soap remains, then set everything on a clean paper towel to air dry completely.
For extra disinfection, you can microwave the disassembled bottle, cap, and tube for 40 seconds. Do not put the bottle in a dishwasher, as the interior won’t get properly cleaned. Replace the entire bottle every 3 months, or sooner if you notice discoloration or cracks.
Troubleshooting Common Problems
If the rinse stings or burns, the most likely culprit is your salt ratio. Too much or too little salt relative to water creates an imbalance that irritates the nasal lining. Measure carefully rather than eyeballing it. Water temperature matters too: lukewarm is the target. Cold solution can cause a sharp, uncomfortable sensation, and hot solution can damage tissue.
If you feel pressure in your ears during rinsing, you’re likely squeezing too hard or blowing your nose too forcefully afterward. Use a gentler squeeze and let gravity assist. If liquid drains into your throat, tilt your head further forward and keep your mouth open wider.
If nothing seems to flow through at all, your congestion may be too severe for the rinse to penetrate. Try using a saline spray first to loosen things up, then attempt the full rinse 10 to 15 minutes later.
Using Nasal Rinses on Children
Nasal irrigation is safe for babies starting around 9 months old, though you’ll need a device specifically designed for infants with a smaller irrigation tip. The solution recipe is slightly different: 1 teaspoon of non-iodized salt (with an optional teaspoon of baking soda) per 2 cups of sterile water, which is a milder concentration than the adult recipe.
Position your baby leaning forward over a sink or sitting upright with a container under their chin. Use a very gentle squeeze. Check with your child’s doctor before starting nasal irrigation if your child has frequent nosebleeds, recurring ear infections, or a weakened immune system.