The kidneys filter blood through microscopic ducts called nephrons. In each kidney there are approximately 1 million nephrons. When the blood pressure builds up, these nephrons get damaged, and they begin to die. A problem with kidney damage is that even if 10% of your kidneys are working fine, you won’t realize that there is something wrong with your kidneys. Therefore, after getting a hypertension test you can confirm whether your blood pressure needs special care or not. Just for the sake of your kidneys, you must take your hypertension seriously.