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

*Ideal values ​​are calculated based on our database of patient records

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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

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.