How to Rinse Your Sinuses Safely: Nasal Irrigation Step by Step
The right water, the right technique, and the mistakes that make people give up on it.
Part of our Sinusitis condition guide.
Read this before anything else: never rinse with water straight from the tap. Use water that's been boiled and cooled, or sterile or distilled water. UK tap water is perfectly safe to drink—your stomach acid handles it—but the inside of your nose has no such protection. This is the one rule that genuinely matters.
The water rule
Nasal irrigation is very safe, with one significant exception, and it's worth understanding rather than just obeying.
Drinking water is treated to a standard that makes it safe for the digestive tract. Small numbers of organisms that survive treatment are dealt with by stomach acid. The nasal cavity has no equivalent defence, and it sits close to the base of the skull.
| Water | Safe for rinsing? |
|---|---|
| Straight from the tap | No |
| Boiled, then cooled to lukewarm | Yes—the usual approach |
| Sterile water from a pharmacy | Yes |
| Distilled water | Yes |
| Filtered jug water | No—a filter isn't a steriliser |
| Bottled mineral water | No—not sterile |
| Previously boiled water left out for days | No—boil fresh, use within 24 hours |
Boil the water properly, let it cool to lukewarm, and keep any surplus covered in a clean container for no more than 24 hours. Cooling takes longer than people expect—boil it well in advance rather than rushing it.
Does it actually work?
We'd rather be straight with you than oversell it.
NICE says the trial evidence for nasal saline in acute sinusitis is limited, while noting that people may want to try it. The European position paper on rhinosinusitis takes a more favourable view, particularly of larger-volume irrigation for chronic symptoms.
What isn't in dispute: it's harmless when done with safe water, it costs very little, and a great many people find it the most useful thing they do for sinus symptoms. That's a reasonable basis for trying it—just don't expect it to cure an infection. It clears mucus and makes you more comfortable.
What you need
- A rinse device—a squeeze bottle, a neti pot, or a bulb syringe. Squeeze bottles give the most control and are easiest for beginners
- Pre-measured saline sachets—worth buying rather than mixing your own
- Safe water, as above
- A sink and a few minutes
Kits are sold in every pharmacy and are inexpensive. Sachets can be bought separately once you have the device.
Keep the device clean and personal. Rinse it with safe water after every use, let it air dry fully, and replace it as the manufacturer advises. Never share a rinse device, even within a household.
Rinse pot vs saline spray
| Rinse pot or bottle | Saline spray | |
|---|---|---|
| Volume delivered | 100–240ml | A fraction of a millilitre |
| Clears trapped mucus | Yes | Not really |
| Moistens a dry nose | Yes | Yes |
| Convenient away from home | No | Yes |
| Best for sinusitis | Yes | Useful, but secondary |
Sprays still have a place—carrying one for the office or a flight, keeping the nose moist in dry air, or softening mucus before a steroid spray. They're just not a substitute for a proper rinse.
Making the solution
Use a pre-measured sachet. It takes the guesswork out and it's what stops the rinse stinging.
- Dissolve one sachet in the volume of safe water stated on the packet
- Lukewarm, roughly body temperature—test it on your wrist. Too hot or too cold both sting
- Make sure it has fully dissolved before you start
- Mix fresh each time. Don't keep made-up solution
Don't improvise with table salt. Getting the concentration wrong is the main reason rinsing burns, and table salt often contains anti-caking agents that irritate. Sachets cost very little and remove the problem entirely.
The technique, step by step
1
Stand at a sink and lean forward
Tip your head forward over the basin, then turn it to one side so one nostril is above the other. Don't tilt your head back.
2
Open your mouth and breathe through it
Keep breathing through your open mouth for the whole rinse. This is what keeps the solution out of your throat and ears.
3
Seal the spout in the upper nostril
Place it against the nostril to form a comfortable seal. Don't push it deep inside.
4
Squeeze gently and steadily
Solution enters the upper nostril and should run out of the lower one. Gentle and continuous beats forceful. If nothing comes out the other side, that side is fully blocked—stop and try the other nostril.
5
Use about half the solution, then swap
Turn your head the other way and repeat on the other side.
6
Blow your nose gently
One nostril at a time, softly. Blowing hard immediately afterwards can push fluid towards your ears.
Expect it to feel odd the first few times. Most people are comfortable with it by the third or fourth attempt.
Six mistakes people make
| Mistake | What happens | Fix |
|---|---|---|
| Tap water | Small but serious infection risk | Boiled and cooled, sterile or distilled only |
| Tilting the head back | Solution runs down the throat | Lean forward over the sink |
| Swallowing or talking mid-rinse | Opens the Eustachian tube; fluid tracks to the ear | Breathe through an open mouth, stay quiet |
| Guessing the salt | Stinging, and people give up | Pre-measured sachets |
| Water too hot or cold | Uncomfortable, sometimes painful | Lukewarm, test on your wrist |
| Forcing a fully blocked side | Pressure and pain, nothing drains | Stop, do the other side, try again later |
How often, and for how long
| Situation | Frequency |
|---|---|
| Acute episode | Once or twice daily, usually morning and evening |
| Chronic symptoms | Once daily, ongoing |
| Prevention if you get recurrent sinusitis | Once daily, or during cold season |
| Alongside a steroid nasal spray | Rinse first, then spray |
There's no maximum duration. Unlike decongestant sprays, which cause rebound congestion beyond about a week, saline can be used indefinitely. Many people with recurrent sinusitis rinse daily year-round.
Rinsing alongside a steroid spray
Order matters, and getting it wrong wastes the medicine.
Rinse first. Wait a few minutes. Then use the spray.
A steroid nasal spray has to reach the lining to work. If that lining is coated in mucus, the spray lands on the mucus and gets blown away. Rinsing clears the way.
Doing it the other way round simply washes the medicine out. Our guides on mometasone nasal spray and beclometasone nasal spray cover spray technique in detail.
Children
- Babies and toddlers: saline drops or a gentle saline spray, safe from infancy. Useful before feeds and sleep
- School age and older: larger-volume rinsing is possible once a child can co-operate, breathe through their mouth and lean over a sink
- Use a paediatric product rather than an adult rinse pot, and ask a pharmacist what suits their age
- Never force it. A frightened child won't co-operate next time, and saline drops work perfectly well
Access Doctor treats adults aged 18 and over only. See our guide to sinusitis in children for the wider picture.
When not to rinse
- After recent nasal or sinus surgery, unless your surgeon has told you to
- If you have a nose injury or a suspected fracture
- If both sides are completely blocked—wait until air moves through at least one side
- If you have an ear infection or a perforated eardrum
- If it consistently causes pain despite correct temperature and salt concentration
Rinsing isn't the answer to these. Seek urgent medical attention for swelling or redness around an eye, a bulging eye, vision changes, a severe headache unlike your usual ones, neck stiffness, or confusion.
Rinsing Not Enough on Its Own?
Where sinus symptoms have persisted past 10 days, a steroid nasal spray is usually the appropriate next step—and it works considerably better alongside daily rinsing. Access Doctor's GPhC-registered pharmacist independent prescribers assess adults online.
View Sinusitis Treatments →Frequently Asked Questions
What water should I use for a sinus rinse?
Never use water straight from the tap. Use water that has been boiled and then cooled to lukewarm, or sterile or distilled water from a pharmacy. UK tap water is safe to drink because stomach acid deals with the small numbers of organisms in it, but the inside of your nose has no such defence. This is the single most important safety point about nasal irrigation, and the one most often ignored.
Does a sinus rinse actually work?
NICE notes that the trial evidence for nasal saline in acute sinusitis is limited, though it says people may want to try it. The European position paper on rhinosinusitis takes a more favourable view of larger-volume irrigation, particularly for chronic symptoms. What is not disputed is that it is harmless when done with safe water, costs very little, and a great many people find it the most useful thing they do. It clears mucus rather than treating infection.
Is a rinse pot better than a saline spray?
For sinusitis, yes. Volume is what clears trapped mucus, and a fine-mist spray delivers only a fraction of a millilitre while a rinse pot or squeeze bottle delivers 100 to 240 millilitres through the nasal passages. Most people who say saline did not help for their sinusitis were using a spray. Sprays are useful for moistening a dry nose or before a steroid spray, but they do not flush anything.
How often should I rinse my sinuses?
Once or twice a day is usual during an acute episode, typically morning and evening. For chronic symptoms or as prevention, once daily is common and can be continued long term. Unlike decongestant sprays, there is no maximum duration and no rebound effect, so there is no need to stop after a set number of days. If rinsing repeatedly causes irritation, reduce the frequency rather than persevering.
Why does my sinus rinse burn or sting?
Almost always the salt concentration or the temperature. Plain water without salt stings considerably, and water that is too hot or too cold is uncomfortable. Use a pre-measured sachet rather than guessing with table salt, and aim for lukewarm, around body temperature. If it still stings after correcting both, the lining may simply be very inflamed, in which case rinse more gently and less often for a few days.
Can water get stuck in my ears when rinsing?
It can, and it usually means you swallowed, spoke or closed the back of your throat mid-rinse, which opens the Eustachian tube and lets fluid track towards the middle ear. Breathe through your open mouth throughout and do not swallow while the water is flowing. A blocked or gurgling ear afterwards normally settles within a few hours. Seek advice if it persists or becomes painful.
Should I rinse before or after a steroid nasal spray?
Rinse first, then use the spray a few minutes later. The rinse clears the mucus that would otherwise block the spray from reaching the lining, so the medicine works better. Using the spray first and then rinsing simply washes it away. Blow your nose gently after rinsing, wait a few minutes for things to settle, then spray.
Can children use a sinus rinse?
Saline drops and sprays are safe from infancy and are the usual approach for young children. Larger-volume rinsing needs a child old enough to co-operate, breathe through their mouth and lean over a sink, which in practice is usually school age or older. Never force it. Speak to a pharmacist about what suits your child's age, and use a purpose-made paediatric product rather than an adult rinse pot.
Completing the treatment
Rinsing clears mucus. It doesn't reduce the inflammation that closed the sinus openings in the first place, which is why it works best paired with a steroid nasal spray once symptoms have passed the 10-day mark. Access Doctor supplies mometasone nasal spray for sinusitis and beclometasone nasal spray for sinusitis, and where a bacterial infection is genuinely likely, phenoxymethylpenicillin or doxycycline, following an online consultation reviewed by a pharmacist independent prescriber.
Steroid spray · Rx
Mometasone Nasal Spray for Sinusitis
Use after rinsing, not before.
View product →Steroid spray · Rx
Beclometasone Nasal Spray for Sinusitis
Twice-daily alternative steroid nasal spray.
View product →Antibiotic · Rx
Phenoxymethylpenicillin for Sinusitis
Where a bacterial sinus infection is genuinely likely.
View product →Antibiotic · Rx
Doxycycline Capsules for Sinusitis
Alternative where penicillin cannot be used.
View product →References
- NHS. Sinusitis (sinus infection). nhs.uk
- National Institute for Health and Care Excellence. Sinusitis (acute): antimicrobial prescribing (NG79). nice.org.uk
- NICE Clinical Knowledge Summaries. Sinusitis. cks.nice.org.uk
- Fokkens WJ et al. European Position Paper on Rhinosinusitis and Nasal Polyps. rhinologyjournal.com
- NHS. Steroid nasal sprays. nhs.uk
- Drinking Water Inspectorate. Drinking water quality in England and Wales. dwi.gov.uk
- NHS. Decongestants. nhs.uk
Medical disclaimer: This article is for informational purposes only and does not constitute medical advice. Always follow the instructions supplied with your rinse device and saline sachets. Consult a qualified healthcare professional for diagnosis and treatment. In a medical emergency, call 999.