High blood pressure, also known as hypertension, is a serious and common condition that can lead to life-threatening diseases such as heart attack, stroke, heart or kidney failure, and more. Blood pressure is measured by two numbers: the top number is the systolic pressure (when the heart is pumping blood) and the bottom number is the diastolic pressure (when the heart is at rest). A normal blood pressure number is below 120/80, prehypertension is diagnosed between 120/80 – 139/89, Stage 1 hypertension is between 140/90 – 159/99, and Stage 2 hypertension is blood pressure above 160/100