High blood pressure, also called hypertension, is often described as a “silent” condition because many people do not feel symptoms. But even when you feel fine, high blood pressure can place extra strain on your blood vessels, heart, brain, and kidneys.
Your kidneys are especially sensitive to changes in blood pressure. They depend on healthy blood vessels to filter waste and extra fluid from your body. When blood pressure stays too high over time, those small blood vessels can become narrowed, weakened, or damaged. As a result, the kidneys may not filter blood as well as they should.
This is why high blood pressure and kidney disease are so closely connected.
How does high blood pressure affect kidney function?
Your kidneys help regulate fluid balance, remove waste, and support healthy blood pressure. When blood pressure is consistently elevated, it can damage the arteries around the kidneys. That damage can reduce blood flow and make it harder for the kidneys to do their job.
Over time, uncontrolled hypertension may contribute to chronic kidney disease, also known as CKD. It can also make existing kidney disease worse. According to the National Kidney Foundation, high blood pressure is the second leading cause of kidney failure in the United States after diabetes.
Why kidney disease can make blood pressure harder to control
The relationship between high blood pressure and kidney disease goes both ways. High blood pressure can damage the kidneys, and damaged kidneys can make blood pressure more difficult to manage.
When kidneys are not working well, the body may retain extra fluid and salt. This can raise blood pressure even more. That cycle can continue unless it is identified and treated.
This is one reason your primary care physician may refer you to a nephrologist, also known as a kidney specialist, if your blood pressure is difficult to control or if your lab results show changes in kidney function.
What blood pressure numbers should you know?
A normal blood pressure reading is below 120/80 mm Hg. High blood pressure is generally considered to be blood pressure that is consistently 130/80 mm Hg or higher.
One high reading does not always mean you have hypertension. Blood pressure can rise temporarily because of stress, caffeine, pain, activity, or even nervousness at a doctor’s office. But repeated high readings should be taken seriously.
When should you talk with a kidney specialist?
You may benefit from seeing a nephrologist if you have:
- High blood pressure that remains elevated despite medication
- High blood pressure along with diabetes
- Abnormal kidney function blood tests
- Protein in the urine
- A history of chronic kidney disease
- Swelling in the legs, ankles, or feet
- A family history of kidney disease
- Multiple blood pressure medications and still no clear control
A nephrologist can help evaluate whether your kidneys are contributing to your blood pressure problem and whether high blood pressure is affecting your kidney function.
Protecting your kidneys starts with knowing your numbers
Managing blood pressure is one of the most important ways to protect long-term kidney health. This may include medication, nutrition changes, sodium reduction, physical activity, home blood pressure monitoring, and regular lab testing.
The good news is that high blood pressure can often be managed. The earlier it is identified, the more opportunity there is to protect the kidneys, heart, and overall health.
If you have high blood pressure and concerns about your kidney health, Balboa Nephrology can help you understand your risk and take the next step.
Concerned about high blood pressure and kidney health? Talk with your primary care physician about whether a referral to Balboa Nephrology is right for you.
This article is for educational purposes only and is not a substitute for medical advice, diagnosis, or treatment. Always speak with your physician or qualified healthcare provider about your individual health needs.
