How are the kidneys harmed by high blood pressure?

The blood veins in your kidneys, particularly the filtering units that clean your blood, are under more stress when your blood pressure is high. Like other regions of the body, these blood veins can thicken over time, and the filtering units might develop scars. These two alterations have the potential to cause chronic renal disease, which is characterised by the kidneys' inability to function normally and eliminate waste products and excess fluid from the body. Ineffective kidneys can lead to additional spikes in blood pressure through the release of specific hormones or by causing your body to retain water and salt.