What does high RBC and BUN mean in blood test?

High RBC and BUN can be caused by numerous problems.

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

Normal RBC range : 4.5 - 5.5 mil/uL

Age-wise ideal RBC level in blood:
Age Ideal RBC value
<5 years 4.667
5-10 years 4.84
10-15 years 5.02
15-20 years 5.206
20-25 years 5.399
25-30 years 5.391
30-35 years 5.384
35-40 years 5.377
40-45 years 5.369
45-50 years 5.361
50-55 years 5.354
55-60 years 5.347
60-70 years 5.339
70-80 years 5.332
80-90 years 5.325
90-100 years 5.318
>100 years 5.31

If you want your blood test report to be interpreted by RBC specialist, then you can upload your report. Our RBC 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 RBC result may be wrong. Click to know the reason in detail

Click here to know Symptoms of High RBC

Click here to know Symptoms of High BUN

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 RBC cause Heart Attack? Click here to know

Normal BUN range : 6 - 20 mg/dL

Age-wise ideal BUN level in blood:
Age Ideal BUN value
<5 years 6.223
5-10 years 6.454
10-15 years 6.693
15-20 years 6.941
20-25 years 7.199
25-30 years 7.466
30-35 years 7.743
35-40 years 8.03
40-45 years 8.328
45-50 years 8.637
50-55 years 8.957
55-60 years 9.289
60-70 years 9.634
70-80 years 9.991
80-90 years 10.362
90-100 years 10.746
>100 years 11.145

Click here to know Symptoms of High RBC

Click here to know Symptoms of High BUN

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

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High RBC and BUN 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 5.5 mil/uL for RBC and more than 20 mg/dL for BUN, 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 RBC and BUN test. In most hospitals RBC and BUN 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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