The evaluation of sinusitis begins with a history and physical exam.

Physical findings in someone with sinusitis may include:

• Facial tenderness
• Nasal drainage:
• May be yellow or brown
• Posterior nasal drip
• Redness of the lining inside the nose
• Throat redness
• Fever

Tests are not necessary to make the diagnosis of sinusitis.

Tests that may be used to evaluate sinusitis include:

• Complete blood count
• Culture of sinus discharge
• Sinus x-rays
• CT scan of the sinuses
• Nasal endoscopy
• A thin, flexible scope is inserted into the nose, in order to examine the sinuses.