There are a number of ways your doctor can test and treat a sinus infection, including blood tests and CT scans. If your symptoms get better but then return, worsen or last longer than 10 days ...

A sinus infection can spread to the brain ... Brain imaging tests, such as CT and MRI scans, along with the use of antimicrobials, have helped improve the outlook for a brain abscess.

The CT scans show pathological bone growths in the cranium and jawbone, revealing infections and other conditions. Several individuals showed signs of having suffered from sinus or ear infections ...