Sinusitis is usually due to an infection, although swelling from allergies can mimic the symptoms of pressure, pain, and congestion, and allergies can set the stage for a bacterial infection.
There is very often concurrent sinusitis or otitis media (6090% of cases ).
Affected birds may show conjunctivitis, runny eyes, sinusitis and swollen dark blue heads.
Nosocomial sinusitis is a common problem, occurring in up to 30% of nasally intubated patients.
The individual concerned showed transient pyrexia, flu-like symptoms and sinusitis, but after antibiotic treatment made a full recovery.