No natural remedy has been shown to shrink or eliminate established nasal polyps. That is the honest starting point, and it matters because polyps are not a surface irritation you can rinse away. They are soft, painless growths driven by deep-seated inflammation in the sinus lining, and the treatments proven to reduce them (corticosteroid sprays, oral steroids, biologic injections, surgery) all work by directly targeting that inflammation or physically removing the tissue. Still, a number of evidence-backed natural strategies can meaningfully reduce symptoms like congestion, loss of smell, and sinus pressure, and some may help slow polyp regrowth after medical treatment. The research behind each one varies widely in strength.
Why Polyps Keep Coming Back
Nasal polyps grow out of chronic inflammation in the sinus lining, and in the vast majority of cases that inflammation is a specific type driven by a branch of the immune system called the type 2 pathway. The key players are a handful of signaling molecules, especially interleukins 4, 5, and 13, which ramp up the activity of eosinophils, a type of white blood cell that piles into the tissue and keeps the swelling going.1PubMed Central. Pathobiology of Type 2 Inflammation in Asthma and Nasal Polyposis People with nasal polyps often have asthma as well, because the same type 2 immune signature drives both conditions. The sinus tissue fills with eosinophils and produces high levels of local IgE (the antibody associated with allergic reactions), creating a self-reinforcing cycle of swelling and fluid accumulation.2PubMed. Chronic Rhinosinusitis with Nasal Polyps and Asthma
This is why polyps are so stubborn. Surgery can remove them, but if the underlying immune activity is not controlled, they regrow in a large percentage of patients. Interleukin-5, in particular, is critical for keeping eosinophils alive and active in sinus tissue.3PubMed Central. The roles of eosinophils and interleukin-5 in the pathophysiology of chronic rhinosinusitis with nasal polyps Any natural approach that cannot interrupt this cycle is unlikely to make polyps disappear, but it might reduce the burden of symptoms and create a more favorable environment in the sinuses.
Saline Nasal Irrigation
If you do only one natural thing for nasal polyps, this is the one with the most consistent evidence behind it. Rinsing the nasal passages with saline physically flushes out mucus, inflammatory debris, and allergens, and it improves how quickly the cilia (tiny hair-like structures in your nose) move material along. Both normal saline and hypertonic saline (a slightly saltier solution) have been shown to improve nasal stuffiness and obstruction.4PubMed. The effect of saline solutions on nasal patency and mucociliary clearance in rhinosinusitis patients Buffered hypertonic saline appears to improve mucociliary clearance somewhat more than regular saline, with about 40% improvement in clearance time compared to about 24% for normal saline.5PubMed. Effects of buffered saline solution on nasal mucociliary clearance and nasal airway patency
A common question is whether heating the saline makes it work better. A study comparing heated saline to room-temperature saline in patients with chronic rhinosinusitis found that both improved clearance time by a similar amount, and there was no measurable difference between the two.6PubMed Central. Does Heating up Saline for Nasal Irrigation Improve Mucociliary Function in Chronic Rhinosinusitis? So you can use whatever temperature feels comfortable. High-volume rinses, like a squeeze bottle or neti pot, tend to reach further into the sinuses than low-volume sprays, which is why most ear, nose, and throat doctors recommend them for polyp patients.
Rinse Additives Worth Knowing About
Researchers have tested adding various substances to saline rinses to see if they can boost the effect. Two that come up repeatedly are xylitol and manuka honey, and the evidence for each tells a different story.
Xylitol, a sugar alcohol found in many sugar-free gums, was tested as a nasal rinse additive in patients recovering from sinus surgery. The xylitol group had greater symptom improvement than the saline-only group across multiple measures, including an average reduction of about 46 points on a quality-of-life score compared to about 32 points with plain saline.7PubMed Central. Symptom assessment after nasal irrigation with xylitol in the postoperative period of endonasal endoscopic surgery The thinking is that xylitol disrupts bacterial biofilms and reduces the osmotic environment bacteria need, though this was a post-surgical population, so extrapolating to non-surgical polyp patients requires caution.
Manuka honey has strong antibacterial properties in the lab, and a pilot trial in patients with cystic fibrosis-related sinus disease found that manuka honey rinses produced significantly better endoscopic outcomes than saline alone.8PubMed Central. Manuka honey versus saline sinus irrigation in the treatment of cystic fibrosis-associated chronic rhinosinusitis In another trial, patients not receiving oral antibiotics or steroids who used manuka honey rinses were significantly more likely to clear bacterial cultures than those using saline alone.9PubMed Central. Manuka honey sinus irrigation for the treatment of chronic rhinosinusitis However, a separate trial in patients with recalcitrant chronic rhinosinusitis found that the control group actually had better culture clearance than the manuka honey group.10PubMed. Manuka honey sinus irrigations in recalcitrant chronic rhinosinusitis The upshot: manuka honey rinses appear safe, may help certain patients with heavy bacterial involvement, but are not a reliable standalone treatment for nasal polyps.
The Low-Salicylate Diet (For a Specific Subgroup)
One of the most intriguing dietary findings applies to a particular group of people: those with aspirin-exacerbated respiratory disease (AERD), sometimes called Samter’s triad. These patients have nasal polyps, asthma, and a sensitivity to aspirin and similar anti-inflammatory drugs. For this group, a low-salicylate diet has shown real promise. Salicylates are naturally occurring compounds found in many fruits, vegetables, spices, and processed foods, and in people with AERD, dietary salicylates appear to worsen sinus and respiratory symptoms.
A randomized crossover trial in AERD patients found that following a low-salicylate diet for just six days produced statistically significant improvements across nasal symptoms, quality of life, asthma control, and endoscopic polyp scores compared to a regular diet.11PubMed. A novel treatment adjunct for aspirin exacerbated respiratory disease: the low-salicylate diet Another trial confirmed that a week on a low-salicylate diet reduced nasal symptom scores significantly, while a high-salicylate diet did not improve symptoms at all.12PubMed Central. Effect of low salicylate diet on clinical and inflammatory markers in patients with aspirin exacerbated respiratory disease A more recent study examining personalized dietary approaches in this population also found significant decreases in nasal symptom scores and endoscopic inflammation.13PubMed. Low-Salicylate Diet in Patients with Non-Steroidal Anti-Inflammatory Drug-Exacerbated Respiratory Disease
This is genuinely useful information, but with a critical caveat: these benefits have been demonstrated in AERD patients specifically. If you have nasal polyps but tolerate aspirin without problems, a low-salicylate diet has no proven benefit for you, and the diet itself is restrictive enough to be difficult to maintain long-term. If you suspect you have AERD (polyps plus asthma plus reactions to aspirin or ibuprofen), it is worth discussing with your doctor.
Supplements and Anti-Inflammatory Compounds
Several dietary supplements have biological plausibility as anti-inflammatory agents in the sinuses, though the human evidence ranges from encouraging to almost nonexistent. Here is where the research actually stands for the most commonly discussed ones.
Curcumin, the active compound in turmeric, was tested in patients with allergic rhinitis (not nasal polyps specifically) and found to reduce sneezing, runny nose, and nasal congestion. It appeared to suppress several of the inflammatory signaling molecules involved in type 2 inflammation, including IL-4 and IL-8.14PubMed. Effect of curcumin on nasal symptoms and airflow in patients with perennial allergic rhinitis The mechanism is relevant to polyps, but there are no randomized trials of curcumin in polyp patients specifically. Curcumin also has famously poor absorption when taken orally, so the dose and formulation matter a great deal.
Quercetin, a flavonoid found in onions, apples, and berries, has been shown in lab studies to inhibit histamine and inflammatory mediator release from mast cells more effectively than cromolyn, a well-known allergy drug.15PubMed Central. Quercetin is more effective than cromolyn in blocking human mast cell cytokine release and inhibits contact dermatitis and photosensitivity in humans An earlier study on nasal tissue scrapings from allergic rhinitis patients found that quercetin inhibited histamine release by up to 96% at higher concentrations.16PubMed. Histochemical and functional characteristics of metachromatic cells in the nasal epithelium in allergic rhinitis The catch is that these are all lab or tissue studies. How much quercetin from an oral supplement actually reaches your nasal tissue at meaningful concentrations is an open question with no clear answer.
Bromelain, an enzyme derived from pineapple, has documented anti-inflammatory and antibacterial properties, and research has confirmed it can penetrate into the blood and sinonasal mucosa.17PubMed Central. Bromelain’s penetration into the blood and sinonasal mucosa in patients with chronic rhinosinusitis A case-control study using a combination supplement containing bromelain, boswellia, blackcurrant, and vitamin D in chronic sinusitis patients reported reduced nasal inflammation and mucus secretion. The boswellia component inhibits an enzyme involved in producing inflammatory leukotrienes, which contribute to swelling and mucus overproduction in the sinus lining.18PubMed Central. A Supplement with Ribes Nigrum, Boswellia Serrata, Bromelain and Vitamin D to Stop Local Inflammation in Chronic Sinusitis However, because the study used a combination product, isolating the contribution of any single ingredient is impossible.
Vitamin D and Omega-3 Fatty Acids
Vitamin D deficiency appears to be more common in people with nasal polyps than in the general population, and the vitamin plays a well-established role in modulating both innate and adaptive immune responses. A review of the evidence concluded that vitamin D supplementation may be a safe strategy for improving outcomes when used alongside standard therapies for chronic rhinosinusitis with nasal polyps.19PubMed Central. Role of Vitamin D in the Clinical Course of Nasal Polyposis That said, “may improve outcomes alongside standard therapy” is a long way from “shrinks polyps on its own.” If you have polyps, getting your vitamin D level checked and correcting a deficiency is reasonable and low-risk, but expecting it to replace corticosteroid treatment is not supported by the data.
Omega-3 fatty acids, found in fish oil and flaxseed oil, have broad anti-inflammatory properties. An animal study found that a diet rich in alpha-linolenic acid (an omega-3 found in flaxseed) dampened allergic rhinitis symptoms in mice through the production of an anti-allergic lipid mediator that inhibited mast cell degranulation.20PubMed Central. Dietary Omega-3 Fatty Acid Dampens Allergic Rhinitis via Eosinophilic Production of the Anti-Allergic Lipid Mediator 15-Hydroxyeicosapentaenoic Acid in Mice This is a mouse study, so direct clinical translation remains uncertain, but it fits with the broader body of evidence showing omega-3s can reduce inflammatory mediator production. For someone already taking omega-3 supplements for general health, there is at least a mechanistic reason to think they could modestly support sinus health.
Reducing Your Exposure to Air Pollution
This is an underappreciated factor. Fine particulate matter (PM2.5), the kind produced by vehicle exhaust, wildfire smoke, and industrial emissions, has been shown in lab studies to directly damage the barrier formed by nasal epithelial cells. Exposure to PM2.5 broke down the tight junction proteins that hold these cells together, making the nasal lining more permeable in a dose-dependent fashion.21PubMed Central. Particulate Matter 2.5 Causes Deficiency in Barrier Integrity in Human Nasal Epithelial Cells Urban particulate matter had a similar effect, impairing the nasal epithelial barrier and increasing permeability.22PubMed. Urban Particulate Matters May Affect Endoplasmic Reticulum Stress and Tight Junction Disruption in Nasal Epithelial Cells
When the nasal barrier is compromised, allergens, bacteria, and irritants penetrate more easily into the tissue, potentially fueling the inflammatory cycle that drives polyp growth. A study on nasal polyp tissue specifically confirmed that PM2.5 increased the leakiness of eosinophilic polyp epithelial cells and reduced their tight junction proteins.23PubMed Central. Budesonide repairs decreased barrier integrity of eosinophilic nasal polyp epithelial cells caused by PM2.5 For people with nasal polyps, this means that practical steps to reduce pollution exposure, such as using HEPA air purifiers indoors, avoiding heavy traffic corridors during exercise, and monitoring air quality indexes on high-pollution days, could meaningfully support the integrity of your nasal lining.
Humming and Sinus Ventilation
Humming produces a surprisingly large increase in nasal nitric oxide, about 15 to 20 times more than quiet exhalation, because the vibration rapidly exchanges air between the paranasal sinuses and the nasal cavity.24European Respiratory Journal. Assessment of nasal and sinus nitric oxide output using single-breath humming exhalations Nitric oxide is naturally antimicrobial and helps maintain sinus health. One widely cited case report described a man who claimed to resolve chronic rhinosinusitis by humming strongly for an hour daily over four days, with the hypothesis that the elevated nitric oxide production had antifungal and antibacterial effects.25PubMed. Strong humming for one hour daily to terminate chronic rhinosinusitis in four days
There is a significant problem with applying this to nasal polyps, though. Researchers have found that the normal spike in nasal nitric oxide during humming is completely absent in patients with nasal polyposis. The most likely explanation is that the polyps physically block the passages between the sinuses and the nasal cavity, preventing the air oscillation that humming depends on.26JAMA. Humming, Nitric Oxide, and Paranasal Sinus Obstruction In other words, humming may be useful for maintaining sinus health or preventing mild sinusitis, but once polyps are blocking your sinus openings, the mechanism simply does not work as intended.
Probiotics and the Nasal Microbiome
The bacterial communities living in your nose play a role in sinus health, and disruptions to this microbiome have been linked to chronic rhinosinusitis. One approach that has attracted attention is oral probiotics. A study found that taking probiotics significantly reduced nasal colonization by pathogenic bacteria, including Staphylococcus aureus and Streptococcus pneumoniae, with the elimination of gram-positive pathogens reaching statistical significance.27The American Journal of Clinical Nutrition. Ingested probiotics reduce nasal colonization with pathogenic bacteria S. aureus is particularly relevant to nasal polyps because it produces toxins called superantigens that can amplify the eosinophilic inflammation driving polyp growth.
The research here is still early and has mostly been done in healthy volunteers rather than polyp patients. But the rationale is reasonable: reducing the load of inflammation-promoting bacteria in the nasal passages could help create a less hostile environment. Probiotic nasal sprays are an active area of research, though no standard product or strain recommendation exists yet for nasal polyps.
Exercise and Physical Activity
There is growing recognition that physical fitness interacts with chronic rhinosinusitis outcomes. A randomized controlled trial in patients with nasal polyps receiving biologic treatment found that both those who had sinus surgery and those who did not showed significant increases in cardiorespiratory fitness and daily step counts, with symptom scores dropping substantially in both groups.28Taylor & Francis Online. Mepolizumab treatment is associated with physical activity and cardiorespiratory fitness irrespective of endoscopic sinus surgery in patients with chronic rhinosinusitis with nasal polyps While the patients in this trial were on medication, the findings suggest that physical activity and improved breathing capacity reinforce each other. When your nose works better, you move more; when you move more, systemic inflammation tends to decrease. Regular moderate exercise is anti-inflammatory in its own right and is worth pursuing alongside any other intervention.
What Natural Approaches Cannot Do
The strategies above can reduce symptoms, support sinus function, and in some cases lower the inflammatory burden in your nasal passages. What none of them has been shown to do in controlled studies is reliably shrink existing nasal polyps or prevent their recurrence without medical treatment. Polyps large enough to block your nasal airway, impair your sense of smell, or cause recurrent sinus infections typically require corticosteroid sprays or courses of oral steroids, biologic injections targeting specific inflammatory molecules, or surgical removal. Many patients use natural approaches in combination with these treatments rather than as replacements.
If you have been diagnosed with nasal polyps and are considering a natural-only approach, the biggest risk is letting the condition progress while waiting for a strategy to work. Chronically blocked sinuses can lead to recurrent infections, loss of smell that becomes permanent, and worsening asthma if you have it. The natural strategies described here are best understood as a support layer: they help you breathe better day to day, create a healthier nasal environment, and possibly slow the recurrence of polyps after they have been treated. Expecting them to replace a conversation with an ENT specialist, though, means expecting more than the evidence supports.