Most sinus infections are viral and clear up on their own within 7 to 10 days with simple home care. Antibiotics only help when the infection is bacterial, which accounts for a small fraction of cases. The right treatment depends on whether you’re dealing with a short-lived acute infection or a chronic problem that keeps coming back.
Viral vs. Bacterial: Why It Matters
The single most important factor in treating a sinus infection is figuring out whether it’s caused by a virus or bacteria. Viral sinus infections, which make up the majority of cases, won’t respond to antibiotics at all. Three specific patterns suggest a bacterial cause: symptoms lasting 10 or more days without improvement, a high fever (102°F or above) with thick discolored nasal discharge or facial pain lasting at least three days from the start, or symptoms that initially improve over five to six days and then suddenly get worse again. Doctors call that last pattern “double-sickening.”
If your symptoms don’t match any of those patterns, the infection is almost certainly viral, and the focus should be on managing discomfort while your immune system does the work.
Home Care That Actually Helps
Saline nasal irrigation is one of the most effective things you can do for any type of sinus infection. Flushing your sinuses with a saltwater solution physically washes out mucus, reduces swelling, and helps your sinuses drain. To make your own rinse, mix 3 teaspoons of iodide-free salt with 1 teaspoon of baking soda and store it in a sealed container. When you’re ready to rinse, dissolve 1 teaspoon of that mixture in 8 ounces of lukewarm water. For children, use half a teaspoon in 4 ounces of water. If it stings, use a little less of the dry mix next time.
The water matters more than people realize. Always use distilled water, previously boiled water that has cooled, or water filtered through a device rated to remove organisms. Tap water straight from the faucet can contain low levels of bacteria and amoebae that are harmless to drink but dangerous when introduced directly into your nasal passages.
Other helpful measures include staying well hydrated, breathing in steam from a hot shower, applying a warm compress over your sinuses, and sleeping with your head slightly elevated to encourage drainage. Over-the-counter pain relievers can take the edge off facial pressure and headaches.
When to Use Decongestant Sprays (and When to Stop)
Topical decongestant sprays like oxymetazoline can provide fast relief by shrinking the blood vessels inside your nose, reducing swelling and opening up your airways. But you should not use them for more than three days. After that point, the sprays can actually cause a rebound effect called rhinitis medicamentosa. Prolonged use starves nasal tissue of blood flow, leading to tissue damage and a new wave of inflammation. The congestion comes roaring back, often worse than before, creating a cycle where you feel like you need more spray to cope.
Oral decongestants don’t carry the same rebound risk but can raise blood pressure and cause insomnia, so they’re not ideal for everyone.
When Antibiotics Are Needed
If your symptoms meet the criteria for a bacterial infection, your doctor will typically prescribe amoxicillin-clavulanate as the first choice. For adults, a course usually lasts 5 to 7 days. Children typically need a longer course of 10 to 14 days. The combination of amoxicillin with clavulanate covers a broader range of bacteria than amoxicillin alone, which is why guidelines now favor it as the go-to option.
If you have a penicillin allergy, your doctor will choose an alternative. Either way, it’s important to finish the full course even if you start feeling better after a couple of days. Stopping early increases the chance of the infection returning or developing resistance.
Treating Chronic Sinus Infections
A sinus infection is considered chronic when symptoms persist for 12 weeks or longer, or when you get four or more acute episodes per year. The treatment approach shifts significantly at this point. Nasal corticosteroid sprays become a cornerstone of management, reducing the persistent inflammation that keeps sinuses swollen and poorly drained. Common options include fluticasone, budesonide, and mometasone, several of which are available over the counter. These sprays work differently from decongestants. They target inflammation rather than blood vessel size, so they’re safe for long-term daily use.
Saline irrigation also plays a larger role in chronic sinusitis, often done once or twice daily as part of an ongoing routine rather than just during flare-ups. For some people, underlying allergies are fueling the cycle, and getting those under control with antihistamines or allergy immunotherapy can make a meaningful difference.
When Surgery Becomes an Option
Surgery enters the conversation when chronic sinusitis keeps coming back despite consistent medical treatment, or when you’re getting four or more acute infections per year. Two main procedures exist, and the right choice depends on the severity and anatomy of the problem.
Balloon sinuplasty is the less invasive option. A small balloon is threaded into the blocked sinus opening and inflated to widen the passage, then removed. It works well for people with recurrent acute infections or mild chronic sinusitis without significant nasal polyps. The sinus openings in these patients are often naturally narrow, making them prone to blocking up with every cold or allergy flare. Widening them reduces that vulnerability. Recovery is relatively quick, and it’s sometimes done in an office setting.
Functional endoscopic sinus surgery (FESS) is a more extensive procedure reserved for more complex situations: unusual anatomy that prevents balloon use, previous sinus surgery that didn’t work, extensive nasal polyps, or chronic inflammatory conditions like allergic fungal sinusitis. FESS creates larger openings into the sinuses, which allows medicated rinses to reach deep into the sinus cavities and gives doctors ongoing access for monitoring and polyp removal. For people with chronic inflammatory conditions that can’t be safely managed with oral medications alone, these surgical windows often become a long-term management tool, sometimes for life.
In rare cases, surgery is urgent. If a sinus infection erodes through bone and extends into the eye socket, the skull, or surrounding soft tissue, that’s a surgical emergency, not an elective procedure.
Warning Signs That Need Immediate Attention
Sinus infections very rarely become dangerous, but when they do, the infection has typically spread beyond the sinuses into nearby structures like the eye socket or the lining of the brain. Symptoms that demand immediate medical attention include pain, swelling, or redness around the eyes, double vision or other vision changes, a stiff neck, confusion, and a high fever. These can indicate orbital cellulitis or meningitis, both of which require emergency treatment. If you notice any combination of these symptoms during a sinus infection, don’t wait it out.