What does prehypertension indicate?

Prehypertension indicates a state where blood pressure levels are elevated but have not yet reached the thresholds for a diagnosis of hypertension. Specifically, it refers to systolic readings ranging from 120-139 mm Hg or diastolic readings from 80-89 mm Hg. This condition serves as a warning sign that an individual is at an increased risk for developing hypertension and associated cardiovascular issues if lifestyle changes are not made. Recognizing prehypertension allows for early intervention, such as modifications in diet and exercise, which can help prevent progression to higher blood pressure levels.

The other options do not accurately describe prehypertension; low blood pressure readings would apply to hypotension, normal blood pressure readings reflect the absence of elevated blood pressure, and dangerously high blood pressure would indicate a hypertensive crisis, which is distinctly different from prehypertension.