What does high BUN and RBC mean in blood test?

High BUN and RBC can be caused by numerous problems.

High levels of BUN and RBC in the blood indicate a variety of health problems. If your blood BUN level is between 6 mg/dL to 20 mg/dL and the RBC level is between 4.5 mg/dL to 5.5 mil/uL, then your body does not have any underlying health problems. But if BUN and RBC levels exceed these levels, you should see a doctor immediately.

Normal BUN range : 6 - 20 mg/dL

Age-wise ideal BUN level in blood:
Age Ideal BUN value
<5 years 6.078
5-10 years 6.157
10-15 years 6.237
15-20 years 6.318
20-25 years 6.4
25-30 years 6.483
30-35 years 6.567
35-40 years 6.652
40-45 years 6.739
45-50 years 6.827
50-55 years 6.916
55-60 years 7.006
60-70 years 7.097
70-80 years 7.189
80-90 years 7.283
90-100 years 7.378
>100 years 7.474

If you want your blood test report to be interpreted by BUN specialist, then you can upload your report. Our BUN expert will provide you with the most accurate interpretation of your blood test results and treatment within 12 hours. Upload blood test report now

Your BUN result may be wrong. Click to know the reason in detail

Click here to know Symptoms of High BUN

Click here to know Symptoms of High RBC

Besides Lab test failures, there are many other reasons for inaccurate blood results. Know the common reasons for inaccurate blood test results

Can Low or High BUN cause Heart Attack? Click here to know

Normal RBC range : 4.5 - 5.5 mil/uL

Age-wise ideal RBC level in blood:
Age Ideal RBC value
<5 years 4.559
5-10 years 4.618
10-15 years 4.678
15-20 years 4.739
20-25 years 4.801
25-30 years 4.863
30-35 years 4.926
35-40 years 4.99
40-45 years 5.055
45-50 years 5.121
50-55 years 5.188
55-60 years 5.255
60-70 years 5.323
70-80 years 5.392
80-90 years 5.462
90-100 years 5.461
>100 years 5.46

Click here to know Symptoms of High BUN

Click here to know Symptoms of High RBC

Can Low or High BUN cause Heart Attack? Click here to know

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High BUN and RBC levels in the blood can cause a number of health problems. Your GP may recommend follow-up tests to get an important picture of your overall health and well-being. If the results are greater than 20 mg/dL for BUN and more than 5.5 mil/uL for RBC, you may also need some follow-up tests that will help detect the underlying disease early.

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How is a blood test performed in the lab?

Depending on the symptoms you are experiencing, your doctor may order a BUN and RBC test. In most hospitals BUN and RBC results can be obtained within three to six hours after blood is taken. The blood is usually drawn from a vein on the inside of the elbow or the back of the hand. Drink plenty of water before your appointment. If you experience any symptoms that you are concerned about are out of the ordinary, call your doctor immediately.

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