Nasal Rinse Statistics & Facts (2026)

Nasal Rinse Statistics & Facts (2026)

Nasal rinsing — flushing the nasal passages with a saline solution to clear out pollen, dust, and debris — is one of the most widely used home practices for sinus and allergy discomfort. But how common are the conditions people rinse for, what do the clinical trials actually show, and what does the water-safety data say?

This page collects the key numbers, each tied to its primary source. We make Clair, a physician-developed electric nasal rinse device, and we're disclosing that up front: this is a reference document, not a neutral third-party study. Unless noted, the research below tested saline nasal irrigation in general — not any particular device. For background on the practice itself, see our guide to daily nasal hygiene.

Figures are quoted as their sources reported them. Survey years, sample sizes, and definitions vary between studies, so treat cross-study comparisons with care — the source and year travel with every number.

Allergies: how many people are affected

• 1 in 4 U.S. adults has seasonal allergies. In 2024, 25.2% of adults and 20.6% of children had a diagnosed seasonal allergy, according to National Center for Health Statistics data briefs drawn from the National Health Interview Survey. Counting eczema and food allergies too, 31.7% of adults and 29.5% of children had at least one diagnosed allergic condition. (CDC FastStats)
• Allergic rhinitis affects an estimated 10–20% of people in the USA and Europe, per a peer-reviewed burden-of-disease review. The authors note the wide range reflects real differences in how studies define and measure the condition. (PubMed 22179899)
• Allergies drive millions of doctor visits. Allergic rhinitis was the primary diagnosis in 4.1 million U.S. physician office visits in 2019 (National Ambulatory Medical Care Survey). (CDC FastStats)

Sinusitis: prevalence, cost, and surgery

• Nearly 29 million U.S. adults have diagnosed sinusitis. The CDC reports 28.9 million adults — 11.6% — with diagnosed sinusitis (NHIS, 2018). Chronic sinusitis alone accounted for 2.7 million physician office visits as the primary diagnosis in 2018. (CDC FastStats)
• Women report it more than men. In 2017, 15.0% of adult women versus 8.8% of adult men said a doctor or health professional had told them they had sinusitis in the past 12 months. (CDC MMWR)
• About 1 in 8 U.S. adults is affected by rhinosinusitis, with roughly 30 million individual diagnoses each year, according to one published review of the epidemiology. (PMC6848701)
• The economic burden is measured in tens of billions. A 2025 systematic review summarized a U.S. estimate putting the total annual cost of chronic rhinosinusitis at over $22 billion in direct healthcare spending and lost productivity. Separately, NIH figures cited by the University of Cincinnati put the condition at roughly 14.6% of the U.S. population, the fifth most common condition treated with antibiotics, up to 22 million physician visits, and as much as $5 billion a year. (MDPI; UC)
• Surgery is common when medical therapy fails. More than 500,000 functional endoscopic sinus surgery (FESS) procedures are performed in the United States each year for medically refractory chronic rhinosinusitis. (PMC4357345)

Allergies vs. sinusitis: the diagnostic overlap

One reason both sets of numbers above are so large: the two conditions are frequently confused.

• Many "allergy" patients may actually have sinusitis. University of Cincinnati researchers, publishing in Otolaryngology–Head and Neck Surgery, reported that many patients who believed they had allergies for years — and were treated for allergies without relief — turned out to have chronic rhinosinusitis instead. The two conditions share overlapping symptoms: nasal blockage, drainage, and sinus pressure. (UC)

What the clinical trials found

These are the most-cited randomized trials of daily saline nasal irrigation. They studied irrigation as a practice — none tested the Clair device.

• Rabago et al., 2002 — the landmark trial. Seventy-six adults with frequent sinusitis were randomized: 52 used daily hypertonic saline nasal irrigation for 6 months, 24 continued usual care. Compliance averaged 87%. The irrigation group's sinus-related quality-of-life scores improved significantly versus control; the number needed to treat for a 10% improvement was just 2.0. Fewer two-week periods with sinus symptoms, less antibiotic use, and on the exit questionnaire 93% of irrigation users reported overall improvement — none reported worsening. Side effects were described as minor and infrequent. (PubMed 12540331)
• Rabago et al., 2005 — the follow-up. In patients with chronic sinonasal symptoms, hypertonic saline irrigation improved Rhinosinusitis Disability Index scores from 62.0 to 79.7, SNOT-20 scores from 43.5 to 28.4, and symptom-severity scores from 4.2 to 2.6. Long-term, participants averaged 2.4 irrigations per week — 33% used it regularly and 55% when symptomatic — with high satisfaction and only minor side effects. (PubMed 16025044)
• The SNIFS trial, 2016. In a U.K. trial of 871 adults with chronic or recurrent sinusitis, participants who used a neti pot daily saw modest symptom improvement at 3 and 6 months compared with usual care — whether or not they also inhaled steam. (Harvard Health summary of Little et al., CMAJ)
• What clinician surveys report. In a survey of physicians and pharmacists, only 2.5% said they never recommend nasal saline irrigation — meaning 97.5% recommend it at least sometimes for patients with nasal symptoms. Neti pots were the most commonly recommended device (80.7% of recommenders). (PMC7971247)

How people actually irrigate

• Twice a day is the most common rhythm. In a multicenter survey of rhinosinusitis patients who perform nasal irrigation, 57.7% irrigated twice daily. The device mix among these patients: syringes 54.5%, squeeze bottles 21.8%, neti pots 3.2%, with the rest using bulbs, sprays, or adapters. (PMC7752074)

For a practical look at building the habit, see can you use a nasal rinse every day and our neti pot comparison.

The common cold's toll

Colds are the reason many people first try nasal rinsing, and the population-level burden is enormous.

• Half a billion episodes a year. Fendrick et al. (2003) ran a nationwide telephone survey of 4,051 U.S. households and estimated approximately 500 million non-influenza viral respiratory tract infection episodes occur in the U.S. each year. Seventy-two percent of adults reported at least one such infection in the past year, averaging 2.5 episodes each. The total economic impact approached $40 billion annually — $17 billion in direct costs and $22.5 billion in indirect costs. (doi:10.1001/archinte.163.4.487)
• Workdays lost. The same study's figures, as summarized by the Office of Health Economics, translate to more than 70 million workdays missed per year and $8 billion in absenteeism losses. (OHE)
• The productivity math. Bramley, Lerner & Sarnes (2002) estimated the common cold costs the U.S. about $25 billion a year in lost productivity — $16.6 billion from presenteeism (working while sick), $8 billion from absenteeism, and $230 million from caregiver absenteeism. Each cold episode cost an average of 8.7 lost work hours per employee. (EHS Today)

Note: these studies measure viral respiratory infections broadly, not colds alone — the common cold is the largest share of that category.

Water safety: the rare but serious risks

Nasal rinsing is widely practiced, but the water used matters. These are the documented risks of rinsing with unsterilized tap water — which is why every major guidance says to use distilled, sterile, or boiled-and-cooled water.

• Amebic infections are rare and nearly always fatal. During 2003–2012, 3 of the 31 U.S. Naegleria fowleri infections (the "brain-eating amoeba" that causes primary amebic meningoencephalitis) were linked to nasal rinsing with contaminated tap water; two of the three used a neti pot or similar device. (CDC MMWR)
• A second amoeba, same lesson. A CDC review of Acanthamoeba infections (1994–2022) identified 10 U.S. patients who had performed nasal rinsing; 7 were rinsing to relieve chronic sinusitis symptoms, at least 4 used tap water, and 1 used sterile water but then submerged the device in tap water. (Emerg Infect Dis)
• The official guidance is unambiguous. The CDC says: when rinsing your sinuses or nasal passages, use store-bought distilled or sterile water, or tap water that has been boiled and cooled. (CDC)

Read our full breakdown in is nasal irrigation safe.

Sleep and snoring

Nasal congestion is frequently cited as a contributor to snoring, and snoring itself is remarkably common.

• More than half of Americans snore. In large epidemiological studies, 52.8% of 22,745 American participants self-reported habitual snoring. (PMC6411174)
• Sleep apnea's footprint. A ResMed-commissioned global survey found approximately 52% of Americans reported snoring or being told they snore; the company estimates sleep apnea impacts more than 54 million people in the U.S., while only 22% of respondents said they had ever been tested for it. (ResMed)

Methodology note

Every figure above comes from the cited primary source: CDC/NCHS survey products (NHIS, NAMCS), MMWR reports, or peer-reviewed studies indexed in PubMed/PMC. Figures are quoted as the sources reported them — survey years, sample sizes, and definitions vary, so numbers from different studies aren't always directly comparable. Dollar figures are as published and not inflation-adjusted. We omitted several commonly repeated statistics (including population-level nasal-irrigation usage rates and global allergy totals) because we could not verify them against a primary source. If you spot an error or a dead link, it will be corrected — linkable pages have to earn the link.