Your kidneys filter waste and extra fluid from your blood. High blood pressure and diabetes are the most common causes of chronic kidney disease, or CKD. The damage they cause builds up slowly over many years. Many people have no symptoms until the disease is advanced. High blood pressure can directly harm your kidneys. Managing blood pressure and blood glucose — the sugar level in your blood — may help prevent CKD or slow it down. Treatments may include medicines to lower blood pressure and control blood sugar, though they cannot cure CKD. Talk with your care team about your kidney test results and goals.