Most sinus infections are viral and clear up on their own within one to two weeks, so the first line of treatment is usually symptom relief at home rather than antibiotics. About 70% of even bacterial sinus infections resolve without antibiotic treatment, according to Mayo Clinic data. What gets done for your sinus infection depends largely on whether it’s viral or bacterial, how long it’s lasted, and how severe your symptoms are.
How Doctors Tell Viral From Bacterial
The distinction between a viral and bacterial sinus infection drives every treatment decision. A viral infection typically starts improving on its own within 7 to 10 days. Doctors look for three specific patterns that suggest a bacterial cause: symptoms lasting 10 days or longer without any improvement, a fever of 102°F or higher combined with facial pain and nasal discharge lasting three to four days, or symptoms that start getting better after four to seven days and then suddenly worsen again (sometimes called “double sickening”).
If your symptoms don’t fit any of those patterns, you almost certainly have a viral infection, and antibiotics won’t help. Your doctor will focus on managing your symptoms while your immune system handles the rest.
Symptom Relief at Home
Saline nasal irrigation is one of the most effective things you can do. Flushing your sinuses with salt water thins mucus, washes out irritants, and reduces swelling in the nasal passages. You can use a squeeze bottle or neti pot. The water must be distilled, or boiled for five full minutes and cooled before use. Tap water can contain a rare but dangerous organism called Naegleria, so this step isn’t optional. If you boil water ahead of time, cover it and use it within 24 hours.
Over-the-counter pain relievers like ibuprofen or acetaminophen help with the facial pressure, headache, and general discomfort that come with a sinus infection. Warm compresses placed over the nose and forehead can also ease pressure. Staying well hydrated helps thin mucus so it drains more easily.
Decongestant Sprays: A Short Leash
Nasal decongestant sprays like oxymetazoline can provide fast relief from congestion, but you should not use them for more than three days. After about three days, these sprays cause a rebound effect where your nasal passages swell up worse than before, a condition called rhinitis medicamentosa. Oral decongestants (like pseudoephedrine) don’t carry the same rebound risk and can be used for a longer stretch, though they can raise blood pressure.
Notably, current guidelines no longer recommend antihistamines for sinus infections unless you also have allergies. Antihistamines dry out mucus, which can actually make drainage worse when allergies aren’t the underlying problem.
Nasal Steroid Sprays
Over-the-counter nasal corticosteroid sprays (like fluticasone or mometasone) reduce inflammation in the sinus passages and can speed up recovery modestly. A meta-analysis in the Annals of Family Medicine found that these sprays add about a 7% absolute improvement in symptom resolution compared to doing nothing, with the benefit becoming more noticeable around the three-week mark rather than within the first two weeks. That means for roughly 1 in 13 people, the spray makes a meaningful difference in recovery. It’s a small edge, but combined with saline irrigation, it helps many people feel noticeably better.
These sprays work best when used consistently rather than as needed. They take a few days to build up their anti-inflammatory effect, so starting early is better than waiting until symptoms peak.
When Antibiotics Are Prescribed
If your symptoms meet the criteria for a likely bacterial infection, your doctor will typically prescribe amoxicillin, sometimes combined with clavulanate (a compound that helps the antibiotic work against resistant bacteria). Updated 2025 guidelines from the American Academy of Otolaryngology recommend a 5 to 7 day course, shorter than the 10-day courses that were standard in the past.
If you have a penicillin allergy, alternatives include doxycycline for adults or, less commonly, a fluoroquinolone antibiotic. Your doctor will choose based on your allergy history and the severity of your symptoms.
Even when antibiotics are appropriate, many doctors will discuss “watchful waiting” first. Since 70% of bacterial sinus infections resolve on their own within two weeks, one common approach is to give you a prescription but ask you to wait two to three days before filling it, to see if symptoms start improving without medication. If they do, you skip the antibiotics entirely.
What Happens With Chronic or Recurring Infections
If sinus infections keep coming back or symptoms persist for 12 weeks or more, the problem is considered chronic sinusitis. At that point, treatment shifts from short-term fixes to addressing the underlying cause. Your doctor will likely order a CT scan of your sinuses to look for structural issues, polyps, or unusual bone growth that could be blocking normal drainage.
When chronic symptoms don’t improve with ongoing medical treatment (nasal steroids, saline rinses, and possibly a longer antibiotic course), surgery becomes an option. The two main procedures are balloon sinuplasty and functional endoscopic sinus surgery (FESS). Balloon sinuplasty is the less invasive option: a small balloon is inflated inside the blocked sinus passage to widen it, and most patients recover quickly. It works well for people whose main problem is blocked drainage pathways without large polyps. FESS is reserved for more extensive disease, particularly when large nasal polyps need to be physically removed or when the anatomy requires reshaping to restore airflow. The right choice depends on what the CT scan shows and how your body has responded to treatment so far.
Warning Signs That Need Immediate Attention
Sinus infections very rarely become dangerous, but the sinuses sit close to the eyes and brain, so certain symptoms require urgent care. Get evaluated immediately if you notice pain, swelling, or redness around your eyes, double vision or other vision changes, a high fever, a stiff neck, or confusion. These can signal that the infection has spread beyond the sinuses, and they need treatment that goes well beyond what’s outlined here.