What is a common sign of a sinus infection on physical examination?

A common sign of a sinus infection, also known as sinusitis, observed during a physical examination is tenderness over the sinuses. This tenderness is typically elicited by palpating the areas corresponding to the frontal and maxillary sinuses. When there is inflammation and infection in the sinuses, the surrounding tissues become sensitive and tender to touch.

Tenderness over the sinuses provides important diagnostic information, as it indicates inflammation and potential blockage within the sinus cavities. The presence of this sign helps clinicians assess the likelihood of sinusitis and guides the decision on further diagnostic steps or treatments.

Other signs and symptoms may accompany sinusitis, but tenderness over the sinuses is a direct physical manifestation that can be observed during an examination, making it a vital point in identifying a sinus infection.