Any dangerous effect for hight blood pressure?

Many . It is important to keep your blood pressure under good control. Conditions like stroke, heart attack, heart failure, kidney failure , intracranial bleed, death -can happen as the result of /related to -uncontrolled high blood pressure.
Lots! High blood pressure can lead to damage to all organs of the body including the kidneys, eyes, heart, brain... Kidney failure, blindness, heart attach, stroke and death. It is a very serious disease and must be tightly controlled.