Sinus Infection or Just Allergies? How to Tell the Difference

Primary Care
Originally Published:
April 20, 2025
Updated:
April 20, 2025
Read Time:
3 min
Author:
BMG Staff
Sinus Infection or Just Allergies? How to Tell the Difference

Why This Matters

Runny nose. Congestion. Head pressure. When your head feels stuffy and you're constantly reaching for tissues, it can be hard to tell what’s really going on. Is it just allergies—or could it be a sinus infection?

At BASS Medical Group, we help patients across Northern California get clarity and relief. Let’s break down the difference so you know when it’s time to see a provider.

Symptoms: Sinus Infection vs. Allergies

Symptom Allergies Sinus Infection
Runny nose Clear and watery Thick, yellow or green mucus
Nasal congestion Common Common
Facial pain or pressure Rare Common—especially around cheeks and eyes
Fever Uncommon Possible
Cough Dry Wet or productive
Itchy eyes, nose, or throat Very common Rare
Fatigue Sometimes More likely
Bad breath Rare Possible
Pro tip: If your symptoms last longer than 10 days or worsen after initially improving, it may be a sinus infection, not allergies.

What Causes Each Condition?

  • Allergies are triggered by allergens like pollen, dust, or pet dander. Your immune system overreacts, releasing histamines that cause sneezing, itchiness, and congestion.
  • Sinus infections (sinusitis) are caused by viruses or bacteria that inflame the sinus linings. They often follow a cold or upper respiratory infection.

How to Treat Allergies vs. Sinus Infections

Allergy Relief:

  • Antihistamines (e.g., loratadine, cetirizine)
  • Nasal steroid sprays
  • Limiting exposure to allergens (e.g., keep windows closed during high pollen days)

Sinus Infection Relief:

  • Saline nasal rinses
  • Decongestants
  • Prescription antibiotics (only if it’s bacterial)
  • Warm compresses over sinuses
Person with seasonal allergies blowing their nose at home
Allergies and sinus infections share symptoms—but knowing the difference can help you get the right treatment.

When to See a Doctor

You should contact a BASS Primary Care Provider (PCP) if:

  • Symptoms last more than 10 days
  • You have facial pain with a fever
  • Over-the-counter allergy meds aren’t helping
  • You get frequent sinus infections

Our PCPs can determine the cause of your symptoms and recommend appropriate treatments—or refer you to a specialist, if needed.

Find the Right Care at BASS Medical Group

Whether you’re suffering from seasonal allergies or recurring sinus infections, our team is here to help. With Primary Care and ENT providers across Walnut Creek, Oakland, and the greater Bay Area, you can get expert care close to home.

Schedule an appointment today and start breathing easier »

Medical Disclaimer: The information provided in this blog is for educational and informational purposes only and is not intended as medical advice, diagnosis, or treatment. BASS Medical Group does not endorse any specific tests, treatments, procedures, or opinions referenced in this content. Individual results may vary. Always consult with your physician or a qualified healthcare provider regarding any medical concerns or before making changes to your health regimen.