A random urine urea nitrogen (BUN) test is a clinical tool to assess kidney function. Symptoms prompting this test may include changes in urination patterns, swelling, or fatigue. The test measures the amount of nitrogen in the urine, reflecting the kidneys’ ability to filter waste. Abnormal BUN levels may indicate kidney dysfunction, dehydration, or other health issues. Regular monitoring helps detect kidney problems early, allowing for timely interventions and improved overall health outcomes.