When a cold lingers and you've got facial pressure, thick nasal discharge, and a dull headache, it's tempting to assume "sinus infection" and ask for antibiotics. But the data is clear: most "sinus infections" during the first 7-10 days of a cold are still viral, and antibiotics won't help.
That doesn't mean you should ignore symptoms — there are real cases of bacterial sinusitis that benefit from treatment.
What's actually going on
When you have a cold, the lining of your sinuses inflames and produces mucus — this is normal. Most facial pressure and congestion during a cold is from this viral inflammation, not from a bacterial infection. The colloquial term "sinus infection" usually means the bacterial kind that needs antibiotics — and that's actually less common than people think.
The 10-day rule
Clinical guidelines for adults:
- Symptoms less than 10 days and getting better: Almost certainly viral. No antibiotics. Symptomatic treatment.
- Symptoms longer than 10 days with no improvement: Bacterial sinusitis more likely. Antibiotics may be appropriate.
- "Double-sickening" — initial improvement then worsening: Suggests bacterial infection on top of viral. Antibiotics often warranted.
- Severe symptoms from start — high fever (102°F+), severe facial pain, purulent discharge for 3+ days: Bacterial sinusitis likely. Treat without waiting 10 days.
What to look for
Symptoms leaning toward bacterial sinus infection:
- Facial pain or pressure that's localized (over one cheek, around one eye)
- Pain worse when bending forward
- Thick, discolored nasal discharge that's persistent
- Fever above 101°F lasting more than a couple days
- Toothache — sometimes maxillary sinus pressure refers pain to the upper teeth
- Symptoms that have lasted 10+ days without any improvement
- Loss of smell that persists
Symptoms leaning toward viral (cold) sinusitis:
- Diffuse facial pressure rather than localized pain
- Clear or thin nasal discharge (discharge color isn't actually a reliable bacterial marker by itself)
- Mild or absent fever
- Cold symptoms throughout (runny nose, mild sore throat, cough)
- Symptoms peaking around day 3-5 and slowly improving by day 7-10
When sinus symptoms need urgent care
- Symptoms have lasted more than 10 days without improvement
- Symptoms initially improved and are now significantly worse
- Severe facial pain, especially over one side
- Fever above 101°F for several days
- Thick discolored discharge persistent over many days
- Sinus pressure with tooth pain, eye involvement, or eyelid swelling
When sinus issues need the ER
Rare but serious sinus complications:
- Vision changes, double vision, or eye pain with sinus symptoms
- Severe headache with stiff neck or confusion
- Significant swelling around an eye or forehead
- Facial numbness or weakness
What we do at urgent care
- History: Duration, pattern of worsening, prior sinus infections, allergies, smoking.
- Physical exam: Nasal lining, sinus tenderness, throat and ears.
- Antibiotics if bacterial sinusitis is the working diagnosis: Typically amoxicillin-clavulanate first-line. Course of 5-7 days.
- Symptom management regardless of cause.
What you can do at home
- Saline nasal rinses (neti pot or squeeze bottle). Use distilled or pre-boiled water.
- Steam inhalation.
- Stay hydrated. Thins mucus.
- Topical nasal corticosteroid sprays (Flonase, Nasacort) reduce inflammation.
- Avoid overuse of decongestant sprays (Afrin) — limit to 3 days max.
- Acetaminophen or ibuprofen for pain and fever.
Walk in for same-day sinus evaluation
Sage Urgent Care is open every day from 8 AM to 8 PM.
Authoritative sources: CDC: Sinus Infection.