Blood Urea Nitrogen Test
A blood urea nitrogen (BUN) test measures the amount of urea nitrogen found in your blood. Urea nitrogen is a waste product made when your liver breaks down protein. It’s carried in your blood, filtered out by your kidneys, and removed from your body in your urine. If your liver isn’t healthy, it may not break down proteins the way it should. And if your kidneys aren't healthy, they may not properly filter urea. Either of these problems can lead to larger amounts of urea nitrogen in your body. Why do I need this test? If your health care doctor provider thinks that you have kidney problems, you may need a blood urea test (BUN) test to help diagnose the condition. Symptoms that can mean kidney problems include: · Needing to urinate more or less often · Joint or bone pain · Muscle cramps · Restless legs while you’re trying to sleep · Fatigue · Itchiness · Swelling in the arms or legs Many people with kidne