Chronic sinusitis is treated with a combination of daily nasal steroid sprays, saline irrigation, and environmental controls, with surgery reserved for cases that don’t improve after several months of consistent medical therapy. Unlike a short sinus infection that clears up in a week or two, chronic sinusitis involves inflammation lasting at least 12 weeks, and managing it requires a longer-term approach.
Getting the Right Diagnosis First
Chronic sinusitis shares symptoms with allergies, migraines, and recurring acute infections, so confirming the diagnosis matters before committing to a treatment plan. A formal diagnosis requires at least two ongoing symptoms (congestion, facial pressure, reduced sense of smell, or discolored nasal discharge) plus objective evidence of inflammation. That means your doctor needs to see swelling, polyps, or mucus buildup through a nasal endoscope or on a CT scan. A standard sinus X-ray isn’t reliable enough.
This distinction is important because treatment for chronic sinusitis differs significantly from the antibiotics-and-wait approach used for a one-off sinus infection. If you’ve been cycling through rounds of antibiotics without lasting improvement, it’s worth asking whether anyone has actually confirmed chronic inflammation with imaging or a scope.
Nasal Steroid Sprays: The Core Treatment
Prescription and over-the-counter nasal corticosteroid sprays are the foundation of chronic sinusitis treatment. These sprays reduce the inflammation lining your sinus passages, which is the central problem driving your symptoms. Common options include fluticasone (sold as Flonase), mometasone (Nasonex), budesonide (Rhinocort), and triamcinolone (Nasacort). No single spray has been shown to work better than another for chronic sinusitis, so the choice often comes down to cost and personal preference.
Most sprays are used as two sprays in each nostril once daily. The key is consistency. These sprays begin working within hours, but the full benefit builds over weeks of daily use. Using them only when symptoms flare is significantly less effective than continuous daily use. If you’ve tried a nasal steroid “here and there” without results, switching to daily use for a full 8 to 12 weeks is the standard trial period before concluding the spray isn’t helping.
Saline Irrigation
Rinsing your sinuses with saltwater, using a squeeze bottle or neti pot, physically flushes out mucus, allergens, and inflammatory debris. It’s one of the simplest and most consistently recommended treatments. Many people find it provides immediate relief from congestion and helps nasal steroid sprays reach deeper into the sinus passages.
Water safety is critical here. The CDC recommends using store-bought distilled or sterile water. If you use tap water, bring it to a rolling boil for one minute (three minutes at elevations above 6,500 feet) and let it cool before use. Tap water straight from the faucet can contain organisms, including a rare but dangerous amoeba, that are harmless to swallow but potentially fatal when introduced directly into the nasal passages.
Why Antibiotics Often Don’t Help
Chronic sinusitis is primarily an inflammatory condition, not a bacterial infection. This is a crucial distinction. While acute bacterial sinus infections respond to a 5- to 10-day course of antibiotics, chronic sinusitis typically does not. Antibiotics may be appropriate during an acute flare-up on top of underlying chronic disease, but they aren’t a long-term solution and repeated courses contribute to antibiotic resistance.
If your doctor does prescribe antibiotics for a flare, the first-line choice is usually amoxicillin. But the bigger priority is getting the baseline inflammation under control so flare-ups happen less often in the first place.
Oral Steroids: Limited Role, Real Risks
Short courses of oral steroids (like prednisone) are sometimes prescribed to knock down a severe flare, but evidence doesn’t support their routine use for chronic sinusitis. A Cochrane review found insufficient evidence to recommend them as a standard treatment.
The risks of even short courses are more serious than many people realize. A large study of roughly 1.5 million people found that a single short course of oral steroids was associated with a five-fold increase in sepsis risk, a three-fold increase in blood clot risk, and nearly double the fracture risk in the month following treatment. Repeated courses carry additional concerns, including higher rates of diabetes and osteoporosis. If you’ve been prescribed oral steroids multiple times a year for your sinuses, that pattern itself is a signal that your treatment plan needs reassessment.
Avoid Overusing Decongestant Sprays
Over-the-counter decongestant sprays like oxymetazoline (Afrin) can feel like a miracle for blocked sinuses, but they should not be used for more than three days in a row. Beyond that, they cause rebound congestion, a condition called rhinitis medicamentosa, where the nasal tissues swell worse than before you started the spray. For someone with chronic sinusitis, this creates a vicious cycle that layers a new problem on top of an existing one.
Environmental and Allergy Management
For many people, chronic sinusitis is closely linked to allergies. If indoor allergens like dust mites, mold, or pet dander trigger your symptoms, reducing your exposure can meaningfully reduce sinus inflammation over time. Practical steps include using allergen-proof pillow and mattress covers, keeping indoor humidity between 30% and 50% to discourage mold growth, and using a HEPA air filter in your bedroom.
If you haven’t been formally tested for allergies, it’s worth doing. Allergy immunotherapy (allergy shots or sublingual tablets) can reduce the allergic inflammation that feeds chronic sinusitis, and for some people this is the intervention that finally breaks the cycle. Beyond allergens, cigarette smoke, strong chemical fumes, and heavily polluted air all aggravate sinus inflammation and are worth avoiding as much as possible.
When Surgery Makes Sense
Surgery is considered when several months of consistent medical treatment haven’t provided adequate relief. The two main options are functional endoscopic sinus surgery (FESS) and balloon sinuplasty. Both are performed through the nostrils with no external incisions.
FESS removes small amounts of bone and tissue to widen the sinus drainage pathways. Balloon sinuplasty uses an inflatable catheter to stretch the openings wider without removing tissue. A meta-analysis comparing the two found no significant difference in imaging scores or the rate of revision surgery, meaning both procedures produce similar long-term structural results. However, balloon sinuplasty was associated with shorter operating times, slightly better patient-reported symptom scores, and significantly fewer complications.
Recovery from balloon sinuplasty is typically faster, with many people returning to normal activity within a day or two. FESS recovery generally takes about a week, with several follow-up visits for nasal cleaning. Neither procedure is a cure on its own. Most people still need to continue nasal steroid sprays and saline rinses after surgery to manage the underlying inflammation. Surgery opens the drainage pathways; ongoing medical therapy keeps them from closing back down.
Biologic Medications for Nasal Polyps
A subset of chronic sinusitis patients develop nasal polyps, soft growths inside the sinuses driven by a specific type of inflammation often linked to severe asthma. For these patients, injectable biologic medications are now an option when standard treatments and even surgery haven’t been enough. Three biologics are currently FDA-approved for chronic sinusitis with nasal polyps: dupilumab (Dupixent), omalizumab (Xolair), and mepolizumab (Nucala).
These medications are given as injections every two to four weeks and work by blocking specific immune signals that drive polyp growth. They can dramatically shrink polyps, restore the sense of smell, and reduce the need for oral steroids or repeat surgeries. They’re typically reserved for patients who’ve already tried nasal steroids, saline rinses, and at least one surgery without lasting success. The cost is significant, and insurance approval usually requires documentation of prior treatment failures.