What is normal blood pressure?

Hypertension is common. About 65 million American adults - nearly 1 in 3 - have it. It is the most important risk factor for stroke and may cause a rupture of a weakened blood vessel in the brain. You have to when blood pressure is 140/90 or higher. All children with blood pressure over 120/80 should be closely monitored because they are at risk for developing hypertension (also known as pre-hypertension).

Usually, it is considered that a blood pressure reading of greater than or equal to 140 mm Hg (systolic) or greater than or equal to 90 mm Hg (diastolic). Readings in the prehypertension category (120-139 systolic or 80-89 diastolic) indicate an increased risk of developing Hypertension.

Hypertension is a silent disease. No clear signs or warning signs.