Nasal polyps can be reduced with corticosteroid sprays, oral steroids, saline irrigation, and in some cases biologic medications or surgery. Most people see initial shrinkage within two weeks of starting treatment, though full improvement typically takes 12 weeks or longer. The right approach depends on how large your polyps are, what’s driving the inflammation, and whether you’ve tried treatments before.
Corticosteroid Nasal Sprays: The First Step
Steroid nasal sprays are the standard starting treatment for nasal polyps of any size. They work by calming the inflammation that causes polyp tissue to swell, gradually shrinking the growths and opening your nasal passages. You won’t feel dramatic results overnight. Clinical trials show that nasal steroid sprays produce continuing reductions in polyp size over a 12-week treatment period, with improvements in airflow and smell building steadily during that time.
Consistency matters more than anything else. These sprays need to be used daily, not just when symptoms flare. Many people give up too early because they don’t feel immediate relief. The spray also works best when it can actually reach the polyp tissue, which is why doctors sometimes recommend using steroid nasal drops (applied with your head tilted forward) for the first several weeks. Drops deliver medication higher into the nasal cavity where polyps tend to grow.
Long-term use of nasal steroid sprays is generally safe at standard doses. At very high doses (equivalent to more than 1,500 micrograms of beclomethasone per day, which is well above typical polyp treatment), there’s a small increased risk of elevated eye pressure. This is mainly a concern for people who are also using steroid inhalers for asthma or steroid eye drops at the same time, since the total steroid load adds up.
Oral Steroids for Faster Shrinkage
When polyps are large enough to block your breathing or eliminate your sense of smell, a short course of oral steroids can shrink them significantly within about two weeks. This is often called a “burst” and typically involves a set daily dose taken for a limited period. In clinical trials, 83% of patients who took oral steroids followed by nasal steroid sprays saw meaningful improvement in polyp size or smell, compared to 57% who used nasal sprays alone.
The combination approach works well: oral steroids rapidly reduce the bulk of the polyps, and then daily nasal sprays maintain that improvement. One trial found that while oral steroids gave patients faster relief, the nasal spray group eventually caught up on most symptoms by the 12-week mark. The exception was smell, which recovered better with the combined approach.
Oral steroids come with more side effects than sprays, including sleep disruption, mood changes, and elevated blood sugar. Because of these risks, they’re used in short bursts rather than continuously, and most doctors limit how many courses you take per year.
Daily Saline Irrigation
Rinsing your nasal passages with salt water won’t shrink polyps on its own, but it’s one of the most effective supporting treatments you can add. High-volume saline irrigation (using a squeeze bottle or neti pot, not just a mist spray) flushes out mucus, inflammatory debris, and allergens that contribute to the swelling cycle. In an 18-month study, patients who performed daily irrigation with a 2% saline solution reported improved sinus symptoms, higher quality of life, and reduced need for antibiotics and nasal sprays.
The key details: use a large volume (at least 240 mL per side), do it daily, and use a hypertonic solution (saltier than your body’s fluids) rather than plain saline. Hypertonic solutions draw fluid out of swollen tissue, which helps open the passages. Always use distilled, boiled, or filtered water to avoid infection.
Biologic Medications for Stubborn Polyps
If your polyps keep growing back despite steroids and surgery, biologic medications represent a newer option. Three have been approved specifically for chronic sinus disease with nasal polyps: dupilumab (approved in 2019), omalizumab (2020), and mepolizumab (2021). Each one targets a different part of the immune response that drives polyp growth.
These are injectable medications, typically given every two to four weeks. They’re reserved for people with recurrent polyps that haven’t responded adequately to other treatments, partly because of their cost and partly because they require ongoing use to maintain their effect. For the right patients, biologics can produce significant polyp shrinkage and restore the sense of smell without additional surgery.
When Surgery Makes Sense
Endoscopic sinus surgery removes polyp tissue and opens up the sinus drainage pathways. It’s effective at restoring breathing and smell in the short term, but polyps have a strong tendency to return. Studies show that about 35% of patients have visible polyp regrowth by six months after surgery, and that number climbs to roughly 40 to 46% by one year. Over five years, between 20% and 50% of patients need a repeat procedure.
Surgery isn’t a cure. It resets the playing field. The real benefit comes from combining surgery with aggressive post-operative treatment (daily nasal steroid sprays, saline irrigation, and sometimes biologics) to slow regrowth. Patients who skip their maintenance therapy after surgery are far more likely to end up back where they started.
Addressing What’s Driving the Inflammation
Nasal polyps are a symptom of chronic inflammation, and identifying the underlying trigger can change your treatment strategy entirely. Three conditions are especially important to rule out.
Aspirin-exacerbated respiratory disease (AERD) affects a subset of polyp patients who also have asthma and reactions to aspirin or ibuprofen. Paradoxically, these patients can benefit from aspirin desensitization, a supervised procedure where escalating doses of aspirin are given until tolerance is established. In one protocol, 93% of patients completed desensitization in a single day. Afterward, they take aspirin daily at a therapeutic dose, which helps control polyp regrowth and asthma symptoms. This only applies to AERD patients and must be done under medical supervision.
Allergies are another common driver. If environmental allergens are fueling your nasal inflammation, allergy testing and targeted treatment (whether avoidance strategies, immunotherapy, or antihistamines) can slow polyp growth. Similarly, uncontrolled asthma and polyps tend to feed each other. Getting asthma under better control often improves nasal symptoms as well.
Diet and Lifestyle Factors
The evidence connecting diet to nasal polyps is limited but suggestive. In one small study of polyp patients tested for food sensitivities, 6 out of 16 participants showed measurable improvement in their polyps after eliminating trigger foods from their diet. That’s a small study, and not everyone will have food-related triggers, but it raises the possibility that unrecognized food intolerances could worsen inflammation in some people.
More broadly, an anti-inflammatory eating pattern (rich in fruits, vegetables, fatty fish, and low in processed foods) supports the same immune pathways that polyp medications target. Omega-3 fatty acids from fish or supplements help shift the body’s inflammatory balance. None of this replaces medical treatment, but reducing your overall inflammatory load gives your other treatments a better chance of working.
What a Realistic Timeline Looks Like
If you’re starting treatment for the first time, here’s roughly what to expect. Oral steroids, if prescribed, produce noticeable improvement in breathing and polyp size within two weeks. Nasal steroid sprays take longer, with gradual improvement building over 4 to 12 weeks. Saline irrigation provides some symptom relief within the first week or two, though its polyp-reducing benefits accumulate over months of daily use. Biologics typically show measurable polyp shrinkage within the first few months of injections.
The most common mistake is treating polyps as a short-term problem. They’re a chronic condition driven by ongoing inflammation. Stopping your nasal spray because you feel better is the fastest route to a flare. The people who do best with nasal polyps are the ones who commit to a daily maintenance routine: saline rinse, steroid spray, and whatever additional medications their situation requires, sustained over months and years rather than used only during bad stretches.