What is the earliest sign of increased intracranial pressure?

• A. Fever
• B. Change in level of consciousness
• C. Papilledema
• D. Pupil dilation

Answer: (B)

The main concept being tested is recognizing the earliest neurological change that signals rising intracranial pressure. A change in level of consciousness occurs first because as ICP climbs, cerebral perfusion pressure falls and brain tissue becomes less able to maintain alertness and orientation. This subtle shift—restlessness, confusion, or decreased responsiveness—often marks the initial response to pressure before focal signs or cranial nerve abnormalities appear.

In contrast, papilledema takes time to develop and is a late sign of sustained elevated ICP. Pupil dilation tends to occur with more advanced pressure or brainstem involvement, such as herniation, rather than at the outset. Fever points to infection rather than ICP alone.