Sinusitis is an inflammation or swelling of the tissue lining the sinuses. Healthy sinuses are filled with air. But when they become blocked and filled with fluid, germs can grow and cause an infection.
Here’s what can cause sinus blockage:
- The common cold
- Allergic Rhinitis (swelling of the lining of the nose)
- Nasal polyps (small growths in the lining of the nose)
- Deviated septum (a shift in the nasal cavity)
Allergies can be a major underlying cause of recurrent sinus infections, see an allergist!