A sinus rinse flushes warm saltwater through one nostril and out the other, physically washing away mucus, allergens, and irritants. The technique is straightforward, but getting the details right matters for both comfort and safety. Here’s how to do it properly.
How Sinus Rinsing Works
Saline flowing through your nasal passages does several things at once. It thins out thick mucus and helps your nasal lining clear it more efficiently. The gentle pressure of the fluid also stimulates the tiny hair-like structures (cilia) that line your sinuses, boosting their natural sweeping motion. If you use a slightly saltier solution, it draws extra water out of swollen tissue, which can open up congested passages and make breathing easier almost immediately.
What You Need Before You Start
You’ll need a rinse device (a squeeze bottle, neti pot, or bulb syringe), saline packets or homemade saline mix, and safe water. The water choice is the single most important safety decision. Tap water straight from the faucet is not safe for sinus rinsing, even if it’s fine to drink. Rare but deadly brain-eating amoebas, including Naegleria fowleri, can survive in tap water and home plumbing. The CDC has documented fatal infections from people rinsing their sinuses with unprocessed tap water.
Use one of these water types:
- Distilled or sterile water purchased from a store (the label will say “distilled” or “sterile”)
- Boiled tap water that has been boiled for 3 to 5 minutes, then cooled to lukewarm. Use it within 24 hours and store it in a clean, closed container.
- Filtered water passed through a filter rated to trap infectious organisms (0.2 micron or smaller)
Making Your Own Saline Solution
Pre-made saline packets are convenient, but you can mix your own. Combine 3 teaspoons of iodide-free salt (not regular table salt, which contains anti-caking agents) with 1 teaspoon of baking soda. Store this dry mixture in a small airtight container. When you’re ready to rinse, dissolve 1 teaspoon of the mixture into 8 ounces (1 cup) of lukewarm safe water. The baking soda buffers the solution so it doesn’t sting. If the water feels too warm or too cool on the inside of your wrist, adjust the temperature before putting it in your nose.
Step-by-Step Rinsing Technique
Stand at a sink and lean forward so your face is over the basin. Tilt your head slightly downward and to one side. Place the tip of your squeeze bottle or neti pot snugly against your upper nostril, forming a gentle seal.
Open your mouth and breathe through it throughout the entire rinse. Do not hold your breath. Squeeze the bottle gently (or tilt the neti pot) to let the saline flow into your upper nostril. The solution will travel through your nasal passages and drain out of the lower nostril into the sink. About half the bottle typically goes through one side.
After finishing one side, gently sniff inward once or twice to clear remaining fluid. Do not blow your nose hard. Forceful blowing can push fluid into your eustachian tubes and cause ear pressure or pain. Then switch sides: tilt your head the opposite way and repeat through the other nostril.
When you’re done with both sides, lean forward over the sink and let any remaining solution drain. You can gently blow your nose with both nostrils open to clear the last of it.
How Often to Rinse
During a sinus infection, cold, or allergy flare, rinsing once or twice a day is typical and effective. Some people rinse daily or a few times a week even without symptoms as a preventive measure against sinus infections or seasonal allergies. As long as you’re using safe water and keeping your equipment clean, daily rinsing is considered safe for ongoing use.
Troubleshooting Common Problems
If the solution stings or burns, the salt concentration is likely off. Double-check your measurements and make sure you’ve included the baking soda. Water temperature also matters: too cold causes an unpleasant shock, while too warm can irritate tissue. Aim for lukewarm, close to body temperature.
Ear pressure or a feeling that you need to pop your ears is one of the most common complaints. This usually means fluid is being pushed toward your eustachian tubes. The fix is to reduce your squeeze pressure, make sure your head is tilted forward (not backward), and keep your mouth open while rinsing. If ear discomfort continues despite adjusting your technique, stop rinsing and reassess your head positioning. Some people with chronically congested or narrow passages are more prone to this.
If the solution won’t flow through at all, your nasal passages may be too swollen. You can try using a decongestant nasal spray about 10 minutes before rinsing to open things up enough for the saline to pass through.
Cleaning and Replacing Your Equipment
Bacteria and mold can grow inside rinse bottles surprisingly fast, so cleaning after every use is essential. Rinse the bottle, cap, and any internal tubing with safe water (not tap). Add a few drops of dish soap or baby shampoo, seal the cap, and shake vigorously. Squeeze hard to force the soapy water through the tube and cap opening, then rinse thoroughly until no soap remains. Set all pieces on a clean paper towel to air dry completely.
For extra disinfection, you can microwave the empty bottle, cap, and tubing for about 40 seconds. Make sure the microwave interior is cool before you do this. Do not put your rinse bottle in the dishwasher, as the interior won’t get adequately cleaned.
Replace your squeeze bottle every 3 months, or sooner if you notice any discoloration, cloudiness, or cracks in the plastic. A deteriorating bottle is harder to fully sanitize and can harbor bacteria in microscopic surface damage.