Many who are treated for it never get better. But now, doctors at the Mayo Clinic think they know why, CBS 2 News reported.
Chronic sinusitis is an inflammation of the membranes in the nose and sinuses.
The sufferers gets chronic headaches, runny nose, and nasal congestion. A diminished sense of smell and taste are also typical symptoms. The Mayo Clinic research team says the problem is fungus. Fungus and mold spores are in the air we breathe. The researchers studied 210 patients with sinusitis.