No one wants to hear that he or she has high blood pressure. But, interestingly, low blood pressure can also be bad for the health for a variety of reasons. Most recently, a link was discovered between low blood pressure and brain function. Low blood pressure has been linked to a higher risk of brain atrophy, which is the death of brain cells or of the connections that exist between the brain cells. Normal, healthy blood pressure for adults is considered to be around 120/80. The systolic, or top, number measures the pressure of the blood in the arteries, and the diastolic, or bottom, is concerned with the pressure between heartbeats.
A diastolic number under 70 is considered low. As long as you’re not experiencing symptoms of low blood pressure, there is no need for concern. Most doctors consider chronically low blood pressure dangerous only if it causes noticeable signs and symptoms such as dizziness, fainting, unusual thirst, blurred vision, lack of concentration, nausea, fatigue, depression, and cold, clammy skin.
P.S. Lowering the pressure of people with high blood pressure can slow brain atrophy.