(Photo credit: E+/Getty Images) If either number is too high or too low, it can signal a health ... lead author of a study on mean arterial pressure (MAP) found that MAP, which takes both systolic ...

If you’re taking an alpha-blocker and have low diastolic blood pressure, a doctor can prescribe a different high blood pressure medication. As we age, we lose the elasticity of our arteries.

However, there are numerous possible causes of low blood pressure and headaches. Very high or very low blood pressure can indicate an underlying condition or issue that needs treatment.