What is the first sign of increased intracranial pressure?

The change in level of consciousness is identified as the first sign of increased intracranial pressure (ICP) because it is a direct reflection of the brain's ability to function properly. As ICP increases, the pressure on the brainstem can interfere with its regulatory functions, leading to alterations in consciousness. This may manifest as confusion, decreased alertness, or diminished responses to stimuli.

Recognizing changes in consciousness is crucial for timely intervention, as it often serves as a warning sign of more serious underlying issues that may require immediate medical attention. While severe headache, restlessness, and nausea and vomiting can also be symptoms associated with increased ICP, they typically occur at later stages or in conjunction with other signs, rather than being the initial indicator. Thus, monitoring consciousness levels is a key component in assessing patients at risk for increased intracranial pressure.