Most sinus infections are caused by viruses and clear up on their own within 10 days. Treatment focuses on managing symptoms while your body fights off the infection. If your symptoms last longer than 10 days without improving, or get worse after initially getting better, you’re likely dealing with a bacterial infection that may need antibiotics.
Viral or Bacterial: Why It Matters
A sinus infection, or sinusitis, means the tissue lining your sinuses is inflamed and swollen, trapping mucus and creating that painful pressure you feel around your eyes, nose, and forehead. The hallmark symptom is thick, discolored nasal discharge combined with either nasal congestion, facial pressure, or both. Facial pressure alone, without that discharge, isn’t enough to point to a true sinus infection.
The vast majority of sinus infections start with a cold virus. If your symptoms have been present for fewer than 10 days and aren’t getting worse, it’s almost certainly viral, and antibiotics won’t help. Two patterns signal a bacterial infection: symptoms that persist 10 days or more without any improvement, or what doctors call “double worsening,” where you start to feel better and then get noticeably worse again within 10 days. That second pattern is a strong indicator that bacteria have moved in on top of the original viral infection.
Nasal Saline Rinses
Flushing your nasal passages with salt water is one of the most effective things you can do at home. A neti pot, squeeze bottle, or bulb syringe pushes saline through your sinuses, physically washing out mucus, inflammatory debris, and irritants. Many people feel immediate relief from congestion and pressure afterward.
There is one critical safety rule: never use plain tap water. Tap water can contain amoebas, including Naegleria fowleri, that are harmless if swallowed but can cause a nearly always fatal brain infection if they enter through the nose. Use store-bought water labeled “distilled” or “sterile.” If you use tap water, boil it at a rolling boil for one minute first (three minutes at elevations above 6,500 feet), then let it cool completely before rinsing. You can rinse one to three times a day during an active infection.
Nasal Steroid Sprays
Over-the-counter nasal corticosteroid sprays (fluticasone, budesonide, triamcinolone) reduce the swelling inside your sinuses, which helps trapped mucus drain. Clinical trials show that people who use these sprays have noticeably better symptom resolution at two to three weeks compared to those who don’t, whether or not antibiotics are also involved. In studies measuring outcomes at 15 to 21 days, about 73% of people using a nasal steroid spray improved, compared to 66% on placebo. Higher doses worked better than lower ones.
These sprays take a day or two to start working and are most helpful when used consistently throughout the infection rather than sporadically. They don’t provide the instant “open” feeling of a decongestant spray, but they address the underlying inflammation driving your symptoms.
Decongestants and Pain Relief
Oral decongestants containing pseudoephedrine or phenylephrine can help reduce swelling in the nasal passages and make breathing easier. Spray decongestants like oxymetazoline work faster and more directly, but you should limit them to three consecutive days. Beyond that, they cause rebound congestion, a cycle where your nasal passages swell up worse than before each time the spray wears off, making you feel like you need more of it.
For the pressure and pain, ibuprofen is generally the better choice over acetaminophen because it reduces both pain and inflammation. Acetaminophen handles pain and fever but won’t address the swelling contributing to sinus pressure. You can alternate the two if one alone isn’t enough, following the dosing directions on each package.
Steam from a hot shower, a bowl of hot water with a towel draped over your head, or a warm compress across your face can also loosen mucus and temporarily ease pressure. Staying well hydrated helps keep mucus thinner and easier to drain.
When Antibiotics Are Needed
If your symptoms have persisted 10 days or more without improvement, or you experienced double worsening, your doctor will likely prescribe antibiotics. The CDC recommends amoxicillin or amoxicillin-clavulanate as first-line treatment. If you’re allergic to penicillin, alternatives include doxycycline or a respiratory fluoroquinolone.
Even when antibiotics are appropriate, you won’t feel dramatically better right away. Continue using saline rinses, nasal steroid sprays, and pain relievers alongside the antibiotic. Most people start noticing improvement within two to three days of starting the medication, though you need to finish the full prescribed course even once you feel better.
It’s worth noting that “watchful waiting” is a reasonable approach even for some bacterial sinus infections. Many resolve on their own. Your doctor may suggest waiting an additional few days with symptom management alone before starting antibiotics, particularly if your symptoms are moderate rather than severe.
Red Flags That Need Immediate Attention
Sinus infections very rarely spread beyond the sinuses, but when they do, the complications are serious. The sinuses sit close to the eyes and brain, and infection can extend into those areas. Seek emergency care if you develop any of the following alongside a sinus infection:
- Eye symptoms: swelling around the eye or eyelid, pain behind the eye, double vision, or any change in your ability to see clearly
- Neurological changes: severe headache unlike your usual sinus pressure, confusion, difficulty staying awake, neck stiffness, or seizures
- High fever with chills or shaking that develops during or after a sinus infection
- Swelling of the forehead, which can indicate infection has reached the bone
These complications are rare but progress quickly. Forehead swelling, eye swelling, or any personality or consciousness changes in someone with a sinus infection warrant a trip to the emergency room, not an urgent care visit.