Correct!

No investigations are indicated! Sinus aspirate is the gold standard for the diagnosis of bacterial rhinosinusitis. CT head is more sensitive than plain x-rays, but radiography is not very specific and cannot differentiate between bacterial and viral sinusitis. However, these investigations are only indicated for suspected intracranial complications, refractory chronic rhinosinusitis, or for preoperative assessment.

Radiographic Findings of acute rhinosinusitis

Given the history and physical, the most likely diagnosis is bacterial rhinosinusitis. What is the most appropriate treatment for this condition?