The kidneys also produce a messenger or hormone called renin which is involved in the control of blood pressure. When the kidneys are damaged or fail, too much of this hormone might be produced, causing blood pressure to rise. High blood pressure can damage the blood vessels of the kidneys. This reduces the blood supply to the kidneys as they cannot work properly. Therefore, waste products are not removed from your body.
Salt is retained, which causes the body to hold fluid.
This extra fluid puts a burden on the heart. Unfortunately kidney disease usually progresses very silently, often destroying most of the kidney function before causing any symptoms. Therefore, people at high risk of developing kidney disease should be evaluated regularly. High blood pressure can be treated and controlled. If your first blood pressure reading is high, it is important to have it measured again.