Chronic sinusitis is treated with a combination of nasal steroid sprays, saline rinses, and sometimes antibiotics, with surgery reserved for cases that don’t improve after several months of medical therapy. Because chronic sinusitis involves inflammation lasting 12 weeks or longer, treatment focuses on controlling that inflammation over time rather than clearing a single infection.
What Qualifies as Chronic Sinusitis
A diagnosis requires at least two of the following four symptoms persisting for more than 12 weeks: thick or discolored nasal drainage, facial or dental pain, nasal obstruction, and reduced sense of smell. That 12-week threshold is what separates chronic sinusitis from the acute version, which resolves within four weeks. Many people cycle through repeated acute episodes before realizing their symptoms never fully clear, which is the hallmark of the chronic form.
Nasal Steroid Sprays: The Core Treatment
Topical corticosteroid sprays are the foundation of chronic sinusitis management. These sprays reduce swelling in the nasal lining and sinus openings, which improves drainage and relieves congestion. You typically spray into each nostril once or twice daily, and it can take several days of consistent use before you notice improvement. Unlike oral steroids, nasal sprays deliver medication directly to the inflamed tissue with minimal absorption into the rest of your body, making them safe for long-term use.
Most people use these sprays for months or even indefinitely. Stopping too early is one of the most common reasons symptoms return. If your doctor prescribes one, think of it more like a maintenance medication than a short course you finish and move on from.
Saline Irrigation
Rinsing your nasal passages with saltwater is one of the most effective and underused tools for managing chronic sinusitis. High-volume rinses using a squeeze bottle (typically 120 to 250 mL per rinse) physically flush out mucus, bacteria, and inflammatory debris from the sinuses. Studies consistently show that rinses of at least 100 mL reliably reach the deeper sinus cavities, while smaller volumes from standard spray cans often don’t penetrate far enough to make a difference.
Some doctors recommend adding a steroid solution to the saline rinse, which delivers medication deeper into the sinuses than a spray alone. This approach is especially useful after sinus surgery, when the opened sinus passages allow even better penetration of the solution. You can buy pre-mixed saline packets or make your own with distilled water and non-iodized salt. Tap water should never be used without boiling and cooling it first, due to the risk of rare but serious infections.
When Antibiotics Are Used
Antibiotics play a smaller role in chronic sinusitis than most people expect. Unlike acute sinus infections, where bacteria are usually the main problem, chronic sinusitis is driven primarily by persistent inflammation. Antibiotics are typically reserved for flare-ups with clear signs of bacterial infection, such as worsening facial pain with fever and thick, discolored drainage. When prescribed, courses tend to run longer than those for acute infections.
Overusing antibiotics for chronic sinusitis can do more harm than good by disrupting the normal bacterial balance in your sinuses and promoting resistance. If you’ve been through multiple rounds of antibiotics without lasting relief, that’s a signal that inflammation, not infection, is the real issue.
Managing Environmental Triggers
What you breathe matters. Exposure to airborne irritants is one of the pathways that can push acute sinus problems into the chronic category and trigger symptom flare-ups in people who already have the condition. Dust, chemical fumes, volatile organic compounds (found in paints, solvents, and cleaning products), secondhand smoke, and particulate pollution all damage the nasal lining’s protective barrier and ramp up inflammation.
People who work around vehicle exhaust, industrial chemicals, or construction dust have higher rates of chronic sinusitis. If you can identify a consistent environmental trigger, reducing your exposure can meaningfully improve symptom control. Practical steps include using a HEPA air purifier at home, wearing a respirator mask in dusty or chemical-heavy environments, and keeping indoor humidity between 30% and 50% to discourage mold growth.
Biologic Medications for Nasal Polyps
Some people with chronic sinusitis develop nasal polyps, which are soft, noncancerous growths that block the sinus passages and are especially difficult to treat with standard therapies. For these patients, injectable biologic medications represent a newer and highly effective option. These drugs work by blocking specific immune signals that drive the type of inflammation responsible for polyp growth.
Two biologics are currently approved for chronic sinusitis with nasal polyps. One blocks the immune signals that fuel allergic-type inflammation broadly, while the other specifically targets the antibody (IgE) involved in allergic reactions. Both are self-injected at home every two to four weeks. Biologics are generally reserved for patients whose polyps keep returning despite steroids and surgery, and treatment guidelines have been updated to better identify which patients benefit most and when it makes sense to switch or stop therapy.
Sinus Surgery
Surgery becomes an option when months of medical therapy haven’t provided adequate relief. The most common procedure, functional endoscopic sinus surgery (FESS), involves inserting a thin camera and small instruments through the nostrils to widen the natural sinus drainage pathways, remove polyps, and clear out diseased tissue. No external incisions are needed.
Success rates for endoscopic sinus surgery range from 76% to 97.5%, with most patients experiencing meaningful improvement in congestion, facial pressure, and sense of smell. Recovery typically follows a predictable timeline: about one week before initial symptom relief begins, four to six weeks for continued improvement, and roughly two months before the full benefits are felt. During recovery, you’ll do regular saline rinses and have follow-up visits for your doctor to clean the healing sinus cavities.
Revision surgery is sometimes necessary if symptoms return, particularly in people with nasal polyps. Potential risks include bleeding, scarring of the sinus openings, and changes in sense of smell, though serious complications like orbital or intracranial injury are rare.
Balloon Sinuplasty
Balloon sinuplasty is a less invasive alternative that uses a small inflatable balloon to widen blocked sinus openings without removing tissue. It works well for patients with chronic sinusitis who don’t have nasal polyps, and it can also help people with persistent symptoms after a previous FESS procedure or those with disease limited to specific sinuses like the frontal (forehead) sinuses. Recovery is generally faster than traditional surgery.
The key limitation is that balloon sinuplasty is not well suited for patients with nasal polyps, since it doesn’t remove tissue. Current guidelines from the American Academy of Otolaryngology do not support using balloon dilation as the sole treatment when polyps are present.
What a Realistic Treatment Path Looks Like
Most people start with daily nasal steroid sprays and saline rinses for at least 8 to 12 weeks. If symptoms persist, your doctor may add a short course of oral steroids or antibiotics for a flare-up, or order a CT scan to better visualize the sinuses. If imaging confirms significant blockage or polyps that aren’t responding to medication, surgery is the next step. After surgery, you’ll continue using nasal rinses and steroid sprays to maintain the results, since the underlying tendency toward inflammation doesn’t disappear. For those with recurrent nasal polyps, biologics may be introduced to prevent regrowth and reduce the need for repeat surgeries.
Chronic sinusitis is a condition you manage over time rather than cure with a single treatment. The most successful outcomes come from consistent use of daily maintenance therapies, not intermittent treatment only during flare-ups.