A saline nasal rinse flushes mucus, allergens, and irritants out of your nasal passages using a simple saltwater solution. The technique takes about two minutes, and the key steps are: use safe water, mix the right salt ratio, lean forward over a sink, and let the solution flow in one nostril and out the other. Here’s everything you need to do it safely and effectively.
Why Saline Rinses Work
Your nasal passages are lined with tiny hair-like structures called cilia that beat in rhythm to push mucus toward the back of your throat, where you swallow it. This system traps bacteria, viruses, allergens, and dust before they reach your lungs. When you’re sick or dealing with allergies, that mucus layer thickens and the cilia slow down, leading to congestion and pressure.
A saline rinse works in two ways. First, the physical force of the liquid dislodges and softens thick, sticky mucus that your cilia can’t move on their own. Forceful irrigation is more effective than gentle washing for this reason. Second, the saline solution speeds up the beating frequency of the cilia themselves, helping your nose clear mucus faster even after you’ve finished rinsing. The result is less congestion, fewer irritants sitting in your nasal tissue, and relief that lasts longer than a decongestant spray.
Choosing Safe Water
This is the most important safety step. Never use plain tap water straight from the faucet. Tap water is safe to drink because stomach acid kills most organisms, but your nasal passages have no such defense. In rare cases, a brain-eating amoeba called Naegleria fowleri has caused fatal infections when people rinsed their sinuses with contaminated tap water. Between 1962 and 2024, 167 cases of this infection were reported in the United States, and some were linked directly to nasal rinsing.
You have three safe options:
- Boiled water: Bring tap water to a rolling boil for 1 minute (3 minutes if you live above 6,500 feet elevation). Let it cool to lukewarm before using. If the water looks cloudy, filter it through a coffee filter or clean paper towel before boiling. You can boil a batch and store it in a clean, sealed container.
- Distilled water: Available at any grocery store or pharmacy. Ready to use without boiling.
- Filtered water: Only if your filter is labeled “NSF 53” or “NSF 58,” or has an absolute pore size of 1 micron or smaller. Standard pitcher filters don’t qualify.
Mixing the Saline Solution
An isotonic solution, meaning it matches the salt concentration of your body, is 0.9% saline. For a standard 8-ounce (240 ml) rinse, that works out to roughly a quarter teaspoon of non-iodized salt. Most pre-made rinse packets contain this amount plus a pinch of baking soda, which buffers the pH so it stings less. If you’re mixing your own, use pure salt without additives: pickling salt, canning salt, or pharmaceutical-grade sodium chloride.
A hypertonic solution (around 2 to 3% salt) draws more fluid out of swollen nasal tissue and can provide stronger decongestion. You’d use about three-quarters of a teaspoon of salt per 8 ounces for this concentration. Hypertonic rinses may cause a temporary burning sensation, so most people start with isotonic and only switch if they need more relief. Either way, use lukewarm water. Cold solution feels uncomfortable, and hot water can damage delicate nasal tissue.
Step-by-Step Technique
You can use a squeeze bottle, neti pot, or bulb syringe. Squeeze bottles give you more control over pressure and are the most popular choice. Here’s the process:
- Fill your device with the prepared saline solution.
- Position yourself over a sink, leaning forward and looking down. Tilt your head to one side so that one ear points toward the sink and the other toward the ceiling. Think of it as listening for a sound coming from the drain.
- Breathe through your mouth the entire time. This closes off the back of your throat and prevents the solution from draining down it.
- Insert the tip snugly into your upper nostril. Squeeze gently (or tip the neti pot) to let the solution flow in. It will travel through your nasal cavity and pour out the lower nostril.
- Use about half the solution on one side, then switch. Tilt your head the opposite way and repeat through the other nostril.
- Blow your nose gently afterward to clear any remaining solution. Blow one nostril at a time by pressing the other closed.
The entire process takes one to two minutes. Some solution may trickle down your throat, which is harmless. If you feel pressure in your ears, you’re squeezing too hard or not tilting your head enough. Ease up on the pressure and adjust your angle so the solution flows freely out the opposite nostril rather than backing up toward your ear canals.
How Often to Rinse
During a cold, sinus infection, or allergy flare, once or twice daily is typical. Some people rinse before bed to sleep more comfortably and again in the morning to clear overnight buildup. For chronic sinus issues, daily use over weeks or months is common and appears to be safe. A CDC study on workers exposed to airborne irritants found that regular nasal rinsing did not negatively affect the natural microbial diversity in the nose, which means you’re not washing away protective bacteria by rinsing regularly.
If your symptoms resolve, there’s no strict need to continue daily. Many people keep rinsing a few times a week during allergy season or whenever they feel congested.
Using Saline Rinses for Children
Saline rinses are safe for children, but the delivery method depends on age. For infants and toddlers under about two years old, saline nose drops or a bulb syringe work best. You squeeze a few drops into each nostril, then use the bulb syringe to gently suction out loosened mucus. Older children can use a squeeze bottle, neti pot, or nasal spray, though they’ll need your help the first several times to get the head position right and learn to breathe through their mouth. Studies have tested saline irrigation in children as young as nine months for upper respiratory infections, with positive results for symptom relief.
Cleaning Your Equipment
Rinse your bottle, neti pot, or syringe with safe water (not tap water) after every use and let it air dry completely. A damp device sitting on a counter is an invitation for mold and bacteria. For a deeper clean, you can microwave the bottle, tubing, and cap for 1.5 to 2 minutes. Dishwashers don’t clean squeeze bottles effectively because they can’t reach the interior surfaces well enough.
Replace your squeeze bottle every three months, or sooner if it becomes discolored or develops a film you can’t remove. Ceramic and stainless steel neti pots last longer but still need regular sanitizing. If you see any visible mold or buildup inside your device, replace it immediately.
Common Issues and Fixes
Stinging or burning usually means the salt ratio is off. Too much salt irritates the tissue, and too little (or plain water) causes a different kind of sting because the solution doesn’t match your body’s salt balance. Pre-measured packets eliminate this guesswork. Adding a small pinch of baking soda also helps reduce irritation.
If the solution won’t flow through, your nasal passages may be too swollen. Try a hypertonic solution to reduce swelling first, or use a nasal decongestant spray about 10 minutes before rinsing to open things up. If one side is always blocked, that could indicate a structural issue like a deviated septum worth mentioning to your doctor.
Ear fullness or popping happens when solution reaches the eustachian tubes connecting your nose to your middle ear. Reduce the squeeze pressure, tilt your head more, and make sure you’re breathing steadily through your mouth. If you have an active ear infection, skip the rinse until it clears.