Urgent Care for Sinus Infection: Will You Get Antibiotics?

When is a sinus infection bacterial vs. viral?

The vast majority of sinus infections (acute rhinosinusitis) start as viral illnesses — typically a cold — and resolve on their own within 10 days. Clinical guidelines identify specific features that suggest a bacterial infection is more likely 1Ref 1Rosenfeld RM, Piccirillo JF, Chandrasekhar SS, Brook I, Kumar KA, Kramper M, et al. (2015).Clinical Practice Guideline (Update): Adult Sinusitis.Defines clinical criteria for bacterial vs. viral acute sinusitis; guides antibiotic prescribing decisions; recommends saline irrigation and intranasal corticosteroids; advises against routine imaging; chronic sinusitis referral thresholds:

• Symptoms lasting 10 days or more without improvement
• Severe symptoms from the start — high fever (above 102°F / 39°C) plus significant facial pain or purulent (thick colored) nasal discharge
• "Double sickening" — initial improvement followed by worsening symptoms after day 5–6

If none of these apply — for example, if you have had congestion and pressure for 4 days — antibiotics are unlikely to help. A Cochrane systematic review found that antibiotics provide limited benefit for viral sinusitis and increase the risk of side effects and resistance 2Ref 2Lemiengre MB, van Driel ML, Merenstein D, Liira H, Mäkelä M, De Sutter AI (2018).Antibiotics for acute rhinosinusitis in adults.Cochrane review: antibiotics provide limited benefit for acute rhinosinusitis and carry risk of side effects and resistance; supports selective use only for likely bacterial cases.

What will urgent care do for a sinus infection?

A clinician will take a focused history and, in some cases, perform a brief examination of your nasal passages, throat, and face. They will ask:

• How long have you had symptoms?
• Have symptoms been getting better, staying the same, or getting worse?
• Do you have fever, facial pressure or pain, and what color is your nasal discharge?
• Have you had a recent cold or upper respiratory illness?

Based on those answers:

• If bacterial sinusitis is likely: an antibiotic is prescribed. Amoxicillin-clavulanate is a common first choice per guideline recommendations 1Ref 1Rosenfeld RM, Piccirillo JF, Chandrasekhar SS, Brook I, Kumar KA, Kramper M, et al. (2015).Clinical Practice Guideline (Update): Adult Sinusitis.Defines clinical criteria for bacterial vs. viral acute sinusitis; guides antibiotic prescribing decisions; recommends saline irrigation and intranasal corticosteroids; advises against routine imaging; chronic sinusitis referral thresholds.
• If viral sinusitis is more likely: supportive care is recommended — and this is appropriate medicine, not a brush-off.

What helps a sinus infection when antibiotics are not prescribed?

Supportive measures that the evidence supports for viral sinusitis 1Ref 1Rosenfeld RM, Piccirillo JF, Chandrasekhar SS, Brook I, Kumar KA, Kramper M, et al. (2015).Clinical Practice Guideline (Update): Adult Sinusitis.Defines clinical criteria for bacterial vs. viral acute sinusitis; guides antibiotic prescribing decisions; recommends saline irrigation and intranasal corticosteroids; advises against routine imaging; chronic sinusitis referral thresholds3Ref 3Harvey R, Hannan SA, Badia L, Scadding G (2007).Nasal saline irrigations for the symptoms of chronic rhinosinusitis.Saline nasal irrigation improves symptom scores and quality of life in rhinosinusitis; supports as a first-line non-antibiotic supportive measure:

• Saline nasal irrigation (with a neti pot or squeeze bottle) can help clear congestion and improve symptom scores.
• Intranasal corticosteroid sprays reduce inflammation and are available over the counter; they work best with consistent daily use.
• Decongestants (oral or topical) can reduce congestion; topical sprays should not be used for more than 3 days to avoid rebound congestion.
• Pain relief with acetaminophen or ibuprofen for headache and facial pressure.
• Staying hydrated and using steam or humidifiers for comfort.

Most viral sinus infections resolve within 7–10 days.

What if I have had sinus problems for months?

Chronic sinusitis — symptoms lasting 12 weeks or more — is a different condition from acute sinusitis and generally requires evaluation by an ear, nose, and throat (ENT) specialist. Urgent care can treat an acute flare-up or worsening, but the underlying pattern warrants specialist evaluation for possible nasal polyps, structural issues, or allergic drivers 1Ref 1Rosenfeld RM, Piccirillo JF, Chandrasekhar SS, Brook I, Kumar KA, Kramper M, et al. (2015).Clinical Practice Guideline (Update): Adult Sinusitis.Defines clinical criteria for bacterial vs. viral acute sinusitis; guides antibiotic prescribing decisions; recommends saline irrigation and intranasal corticosteroids; advises against routine imaging; chronic sinusitis referral thresholds.

Gale's primary care clinicians can evaluate your sinus history and coordinate a referral to an ENT when appropriate.

Will an X-ray or CT scan tell me if I have a sinus infection?

Generally not in an acute setting. Imaging of the sinuses is not recommended for routine acute sinusitis because findings on X-ray and even CT scan do not reliably distinguish viral from bacterial infection, and they expose you to radiation without changing clinical decisions. Imaging is reserved for suspected complications, recurrent infections, or pre-surgical planning 1Ref 1Rosenfeld RM, Piccirillo JF, Chandrasekhar SS, Brook I, Kumar KA, Kramper M, et al. (2015).Clinical Practice Guideline (Update): Adult Sinusitis.Defines clinical criteria for bacterial vs. viral acute sinusitis; guides antibiotic prescribing decisions; recommends saline irrigation and intranasal corticosteroids; advises against routine imaging; chronic sinusitis referral thresholds.