Most sinus infections clear up on their own within 7 to 10 days without any medical treatment. The vast majority are caused by viruses, which means antibiotics won’t help. What will help is a combination of home care strategies that ease your symptoms while your body fights off the infection, and knowing when the situation calls for something more.
Why Most Sinus Infections Don’t Need Antibiotics
Roughly 9 out of 10 sinus infections start with a virus, the same kind that causes the common cold. The infection inflames your sinus lining, which swells, traps mucus, and creates that familiar pressure behind your cheeks, forehead, or eyes. Because viruses cause the overwhelming majority of cases, antibiotics are useless for most people with sinusitis. Taking them unnecessarily contributes to antibiotic resistance and exposes you to side effects for no benefit.
A bacterial infection is suspected only when symptoms persist without any improvement for at least 10 days, or when you experience “double sickening,” where you start to feel better and then get noticeably worse again. Other signs pointing toward bacteria include fever above 100.4°F, severe one-sided facial pain, and thick discolored discharge mainly from one nostril. If your sinus infection follows this pattern, that’s when antibiotics become appropriate.
Nasal Saline Irrigation
Flushing your sinuses with salt water is the single most useful thing you can do at home. It physically washes out mucus, reduces inflammation, and helps your sinuses drain. Stanford Medicine recommends irrigating each nostril twice a day, though doing it more often is fine.
To make the solution, mix 1 teaspoon of non-iodized salt (kosher or pickling salt) and 1 teaspoon of baking soda into 1 quart of water. The water must be either boiled and cooled or distilled. Never use tap water straight from the faucet, as it can contain organisms that are safe to drink but dangerous when introduced directly into your sinuses. Use a squeeze bottle or neti pot, tilt your head, and gently flush half the solution through each side. It feels strange the first time, but most people notice real relief after just a day or two.
Other Home Remedies That Help
Keeping indoor humidity between 30% and 50% prevents your sinus membranes from drying out and cracking, which slows healing. A cool-mist humidifier in your bedroom works well, but clean it regularly to avoid growing mold or bacteria in the reservoir. Breathing steam from a hot shower serves a similar purpose in the short term.
Staying well hydrated thins your mucus and makes it easier to drain. Warm fluids like tea or broth can be especially soothing. Sleeping with your head slightly elevated helps your sinuses drain overnight rather than pooling, which is why many people feel worst in the morning. A warm compress over your forehead and nose can also ease facial pressure.
What About Decongestant Sprays and Steroid Sprays?
Decongestant nasal sprays provide fast, noticeable relief by shrinking swollen tissue in your nasal passages. But they come with a hard limit: no more than three days of use. After about three days, these sprays can cause rebound congestion, a condition where your nasal passages swell up worse than before, trapping you in a cycle of increasing spray use. Oral decongestants carry fewer rebound risks but can raise blood pressure and cause insomnia.
Steroid nasal sprays (the kind you can now buy over the counter) target inflammation more directly. However, the evidence for their effectiveness in acute sinus infections is lukewarm. Two systematic reviews of clinical trials found only minimal benefit, and symptom relief didn’t kick in until 15 to 21 days into treatment. One comparative trial found no significant difference in improvement between people who used steroid sprays, saline rinses, decongestant sprays, or no treatment at all. That said, if you have underlying allergies contributing to sinus congestion, a steroid spray may still be worthwhile as part of your longer-term management.
Over-the-counter pain relievers like ibuprofen or acetaminophen are genuinely helpful for managing the facial pain and headache that come with a sinus infection.
When Antibiotics Are the Right Call
If your symptoms haven’t improved at all after 10 days, or if they worsened after initially getting better, you likely have a bacterial sinus infection. At that point, a doctor will typically prescribe a 5-to-7-day course of antibiotics. You should start feeling better within a few days of beginning treatment, but finish the full course.
For people with penicillin allergies, alternative antibiotics are available. Your doctor will choose based on your allergy history and local resistance patterns. Most bacterial sinus infections respond well to first-line treatment, and complications are rare when the infection is addressed promptly.
Typical Recovery Timeline
For a standard viral sinus infection, expect the worst symptoms during days 3 through 6, with gradual improvement after that. Most people feel significantly better within a week to 10 days, though some residual congestion can linger for up to four weeks. The key indicator is the trajectory: you should be getting a little better each day, even if it’s slow. If the trend is flat or worsening, that’s the signal to see a doctor.
Bacterial sinus infections treated with antibiotics typically improve within 48 to 72 hours of starting medication. If you’ve been on antibiotics for three or four days with no change, contact your doctor, as you may need a different prescription.
Acute vs. Chronic Sinusitis
An acute sinus infection lasts less than 4 weeks. If your symptoms persist beyond 12 weeks, you’ve crossed into chronic sinusitis, which is a different condition with different causes and treatments. Chronic sinusitis often involves structural issues like nasal polyps, a deviated septum, or ongoing allergic inflammation rather than a single infection. It typically requires evaluation by an ear, nose, and throat specialist and may involve longer courses of steroid sprays, allergy management, or in some cases surgery to improve sinus drainage.
If you find yourself getting multiple sinus infections per year, that pattern is also worth investigating. Recurrent infections can point to an underlying cause that, once addressed, breaks the cycle.
Symptoms That Need Immediate Attention
Sinus infections very rarely cause serious complications, but when they do, the infection has typically spread to nearby structures like the eye socket or the lining around the brain. Go to an emergency room if you develop swelling or redness around your eye, pain when moving your eyes, double vision or any change in your ability to see, a very high fever with chills and weakness, or a severe headache with neck stiffness. These symptoms can signal an orbital or intracranial complication that requires urgent treatment.