What does high BUN and RDW mean in blood test?

High BUN and RDW can be caused by numerous problems.

High levels of BUN and RDW 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 RDW level is between 11.6 mg/dL to 14 %, then your body does not have any underlying health problems. But if BUN and RDW 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 6.158
10-15 years 6.239
15-20 years 6.321
20-25 years 6.404
25-30 years 6.488
30-35 years 6.573
35-40 years 6.659
40-45 years 6.746
45-50 years 6.834
50-55 years 6.923
55-60 years 7.014
60-70 years 7.106
70-80 years 7.199
80-90 years 7.293
90-100 years 7.388
>100 years 7.485

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 RDW

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 RDW range : 11.6 - 14 %

Age-wise ideal RDW level in blood:
Age Ideal RDW value
<5 years 11.752
5-10 years 11.906
10-15 years 12.062
15-20 years 12.22
20-25 years 12.38
25-30 years 12.542
30-35 years 12.706
35-40 years 12.872
40-45 years 13.04
45-50 years 13.211
50-55 years 13.384
55-60 years 13.559
60-70 years 13.736
70-80 years 13.916
80-90 years 13.914
90-100 years 13.912
>100 years 13.91

Click here to know Symptoms of High BUN

Click here to know Symptoms of High RDW

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

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Click here to consult a doctor for your Low BUN problem

High BUN and RDW 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 14 % for RDW, 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 RDW test. In most hospitals BUN and RDW 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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