Renal hypertension

The kidneys help regulate fluid, salt, and hormones that influence blood pressure. When kidney tissue is damaged or the artery supplying a kidney is narrowed, these control systems can raise pressure. High pressure can also place further strain on kidney filters, so the relationship may run in both directions.

Renal hypertension may have no obvious symptoms. Some people develop headaches or visual symptoms, but symptoms alone cannot measure blood pressure or show how well the kidneys are working. [Chronic Kidney Disease](/conditions/chronic-kidney-disease/) is one condition clinicians may consider when kidney function is reduced.

A clinician may review home or clinic blood-pressure readings, medicines, family history, and changes in urination. Blood tests can assess kidney function and salts; urine testing can look for protein or blood. Depending on the findings, imaging may examine the kidneys or their blood vessels.

Treatment is individual. It may include blood-pressure medicine, a plan to manage the kidney condition, and practical steps such as taking medicines consistently and limiting excess salt as advised. Do not stop treatment or use anti-inflammatory pain medicines regularly without checking, because some medicines can affect blood pressure or kidney function. [Hypertension](/conditions/hypertension/) provides related background.

Arrange medical review for persistently high readings, new swelling, markedly reduced urination, blood in the urine, or worsening breathlessness. Seek emergency help for severe headache with neurological changes, chest pain, sudden weakness, trouble speaking, or sudden vision loss. These can signal complications such as [Stroke](/conditions/stroke/) or [Transient Ischaemic Attack](/conditions/transient-ischaemic-attack/), while chest symptoms may require assessment for [Angina](/conditions/angina/) or [Heart Failure](/conditions/heart-failure/).

Ask what may be driving your blood pressure, which kidney and urine tests are needed, how often readings should be checked, and whether any current medicine needs adjustment. Ask which symptoms should prompt same-day help and how to protect kidney function during illness.