Often, healthcare providers can diagnose acute sinusitis by reviewing a person’s symptoms and examining the nose and face. Doctors may perform a procedure called rhinoscopy, in which they use a thin, flexible tube-like instrument to examine the inside of the nose.
If symptoms do not clearly indicate sinusitis or if they persist for a long time and do not get better with treatment, the doctor may order a computerized tomography (CT) scan—a form of X-ray that shows some soft-tissue and other structures that cannot be seen in conventional X-rays—to confirm the diagnosis of sinusitis and to evaluate how severe it is.
Laboratory tests that a healthcare professional may use to check for possible causes of chronic rhinosinusitis include:
Last Updated May 15, 2015