Sinus infection: when you need antibiotics, and when you don’t
Sinus congestion, pressure and facial pain are miserable, and they make people desperately want antibiotics. Here is the clinical truth most urgent care visits do not have time to explain: the majority of sinus infections are viral, and antibiotics will not help them at all.
What a sinus infection actually is
Sinusitis is inflammation of the sinuses, the air-filled cavities in your skull. It can be caused by viruses — most commonly — bacteria, allergies, or structural issues. Viral sinusitis is essentially a cold that has settled into your sinuses. Bacterial sinusitis is a secondary infection that sometimes follows a viral illness.
The challenge is that viral and bacterial sinusitis feel almost identical. That is why antibiotic over-prescribing for sinusitis is one of the most common problems in primary care.
Symptoms common to both
Yellow or green mucus does not automatically mean a bacterial infection. The colour comes from white blood cells fighting infection, which happens in viral and bacterial illness alike.
Signs that point toward bacterial
Specialist guidelines suggest considering antibiotics when:
If your symptoms started three days ago and you feel miserable, that is understandable — but waiting out the full 10 days is the evidence-based recommendation before antibiotics are indicated.
What actually helps viral sinusitis
When to see a doctor
Seek evaluation — and telehealth is appropriate for most of these — if symptoms last longer than 10 days, if you have a severe or worsening headache, if you develop a high fever, or if you have significant facial swelling. A $39 quick care visit can establish whether your situation warrants antibiotics, a steroid spray prescription, or further evaluation.
No. Green or yellow mucus is produced by your immune system fighting any infection, viral or bacterial. Colour alone is not a reason to prescribe antibiotics.
If symptoms have not started improving after 10 days, or if they significantly worsen after initially improving, that is a reasonable threshold to seek evaluation for bacterial sinusitis.
Yes — if your symptom history meets the clinical criteria for bacterial sinusitis, your physician can evaluate and send antibiotics electronically to your pharmacy.
This article is general health information, not medical advice for your situation, and does not create a physician-patient relationship. If you are unwell, speak with a physician.
