A BUN test measures the level of urea nitrogen in the blood using a standard blood sample. Abnormal BUN levels may indicate problems with liver or kidney functioning. BUN stands for blood urea ...

Doctors order a blood urea nitrogen (BUN) test to measure the amount of urea nitrogen in your blood. It helps them see how well your kidneys are working. A BUN test measures how much blood urea ...

A blood urea nitrogen (BUN) test measures the amount of urea nitrogen in the blood. The result can indicate how well a person’s kidneys are working. A higher than normal level of BUN may point ...