What does high RDW SD and BUN mean in blood test?

High RDW SD and BUN can be caused by numerous problems.

High levels of RDW SD and BUN in the blood indicate a variety of health problems. If your blood RDW SD level is between 39 fL to 46 fL and the BUN level is between 6 fL to 20 mg/dL, then your body does not have any underlying health problems. But if RDW SD and BUN levels exceed these levels, you should see a doctor immediately.

Normal RDW SD range : 39 - 46 fL

Age-wise ideal RDW SD level in blood:

Age	Ideal RDW SD value
<5 years	39.718
5-10 years	40.449
10-15 years	41.194
15-20 years	41.952
20-25 years	42.724
25-30 years	43.511
30-35 years	44.312
35-40 years	45.128
40-45 years	45.959
45-50 years	45.943
50-55 years	45.928
55-60 years	45.913
60-70 years	45.897
70-80 years	45.881
80-90 years	45.866
90-100 years	45.85
>100 years	45.834

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

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

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Some examples of conditions that increase or decrease RDW SD levels include:

• Thalassemia, an inherited blood disorder
• Crohn's disease
• Chronic liver disease
• An iron or vitamin deficiency
• Heart disease

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

Normal BUN range : 6 - 20 mg/dL

Age-wise ideal BUN level in blood:

Age	Ideal BUN value
<5 years	6.11
5-10 years	6.222
10-15 years	6.337
15-20 years	6.454
20-25 years	6.573
25-30 years	6.694
30-35 years	6.817
35-40 years	6.943
40-45 years	7.071
45-50 years	7.201
50-55 years	7.334
55-60 years	7.469
60-70 years	7.607
70-80 years	7.747
80-90 years	7.89
90-100 years	8.035
>100 years	8.183

High RDW SD 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 46 fL for RDW SD 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 RDW SD and BUN test. In most hospitals RDW SD 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.