Healthy kidneys help keep blood pressure stable

1. How Kidneys Help Control Blood Pressure

Balancing fluids: Kidneys decide how much salt and water to keep or remove from the body.

If they keep more fluid → blood pressure goes up.

If they remove fluid → blood pressure goes down.

Hormone signals: When blood pressure is low, the kidneys release a hormone called renin. This sets off a chain reaction that makes blood vessels tighten and tells the body to hold onto more fluid — raising blood pressure.

2. How High Blood Pressure Can Hurt the Kidneys

High blood pressure damages the small blood vessels in the kidneys.

Damaged kidneys can’t filter waste or control fluids as well.

Over time, this can lead to chronic kidney disease (CKD).

3. How Kidney Problems Can Cause High Blood Pressure

If kidneys don’t remove enough salt and water, fluid builds up → blood pressure goes up.

Sick kidneys may also release too many hormones that keep pressure high.

Key Point:

Healthy kidneys help keep blood pressure steady.
High blood pressure can hurt the kidneys, and kidney problems can raise blood pressure — creating a cycle.