BUN test is a blood test most commonly used to evaluate kidney function. Blood Urea Nitrogen Test is done as a part of the entire body checkup process. Doctors usually recommend it during the health screening process. It helps them see whether your kidneys are working properly or not. Urea Nitrogen is the waste that your body creates after you eat. The liver breaks down the protein present in your food. This produces ammonia which also contains nitrogen. The nitrogen combines with other elements like hydrogen, carbon and oxygen to form urea. This is a chemical waste product. This substance travels through your blood and eventually ends up in your kidneys. If you have healthy kidneys, they will release the BUN in the form of urine. Only a tiny amount of the same is kept in your blood. When your kidneys are unhealthy, they will fail to remove the adequate amount of BUN and leave an excessive amount of it in the blood. The Blood Urea Nitrogen Procedure helps measure the amount of the waste product present in your blood. If your BUN Test levels are not normal, then it means that you have a problem in your liver or kidneys. People who are in the early stage of kidney disease might not have any symptoms. But, the BUN Test results can help diagnose the problem, which can uncover kidney problems from an early stage. The doctor will want to see the Blood Urea Nitrogen Test results if- They suspect that you have kidney disease or damage, Your kidneys need to be evaluated because of certain chronic conditions like high blood pressure and diabetes, you are getting a blood test group to diagnose many other conditions like urinary tract obstruction, gastrointestinal bleeding, congestive heart failure and liver damage, you are on a hemodialysis or peritoneal dialysis treatment as BUN Test results will help determine the effectiveness of this treatment. India faces a lot of chronic kidney diseases. The primary cause behind this is diabetic nephropathy. The treatment cost of the same is also very high in India, but efforts are being made to lower the costs of the same. Kidney problems due to the increase in BUN are majorly seen in parts of Karnataka, Andhra Pradesh, Delhi and Maharashtra.