The main function of the kidneys is to help regulate water and electrolyte levels, support red blood cell production, and filter fluids and waste from the blood, according to the health website Healthline (USA).

However, high blood pressure affects blood circulation, which in turn affects the supply of nutrients and oxygen to the kidneys. The National Kidney Foundation of the United States says a blood pressure reading of 130/80 mmHg or higher is considered high blood pressure.

In fact, many people have high blood pressure without knowing it. Many people know they have high blood pressure but do not take effective measures to control their blood pressure. Statistics in the US show that only 24% of people with high blood pressure pay attention to controlling their blood pressure.

To take good care of kidney health, people with high blood pressure need to understand how high blood pressure affects the kidneys.

If left untreated, high blood pressure puts increased pressure on the arteries to the kidneys. Over time, these arteries can become damaged and hardened, leading to renal artery stenosis, which limits blood flow to the kidneys.

In addition, the American Heart Association says damage to the renal arteries impairs the body's ability to maintain the balance of fluids, salts, acids, and other substances.

In addition, the increased pressure on the blood vessels slows down the kidney's filtration rate. This increases the retention of water and waste products in the blood, such as creatine.

Long-term uncontrolled high blood pressure can lead to chronic kidney disease, a condition in which kidney function gradually declines. Because the disease is often incurable, your doctor’s treatment plan will focus on controlling symptoms, slowing the progression of the disease, and reducing the risk of complications, according to Healthline .