Is BUN 64 high, normal or dangerous? What does Blood urea nitrogen level 64 mean?

📅 Medical Review Date: October 7, 2025

Your BUN level of 64 is a High BUN level.

A BUN level of 64 mg/dL usually means the kidneys are not filtering waste products properly or the body is dehydrated. It suggests reduced kidney function. High levels of BUN can cause fatigue, nausea, loss of appetite, confusion, swelling in feet and ankles, and decreased urine output. This can be caused by dehydration, kidney failure, heart failure, or urinary tract obstruction. Further tests are often needed to identify the cause and guide appropriate treatment.

High BUN levels may indicate underlying health problems. The normal range is typically between 6 mg/dL and 20 mg/dL. If your levels are outside this range, it's important to speak with a healthcare provider. Consulting a doctor is recommended to determine the cause and appropriate next steps.

The normal BUN range for men is :6 - 20 mg/dL

Ideal values of BUN depending on age (male) :

Age	Ideal BUN value
<5 years	6.384
5-10 years	6.793
10-15 years	7.228
15-20 years	7.691
20-25 years	8.183
25-30 years	8.707
30-35 years	9.264
35-40 years	9.857
40-45 years	10.488
45-50 years	11.159
50-55 years	11.873
55-60 years	12.633
60-70 years	13.442
70-80 years	14.302
80-90 years	15.217
90-100 years	16.191
>100 years	17.227

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

Misdiagnosis is more common than people think—and the consequences can be serious. Delayed treatment, unnecessary medication, or worse. If you want a second opinion on your blood work, one option is to upload it to a site like wholebodyprotocol.com, where world-class doctors review your results. They charge a small fee—around $90 (though you'll want to check the latest price as it fluctuates)—and email you a detailed report. With over 12 million people affected by misdiagnosis every year, that little bit of extra peace of mind can go a long way.

Some examples of conditions that increase or decrease BUN levels include:

• Kidney failure
• Decreased blood flow to the kidneys
• Congestive heart failure
• Dehydration
• Conditions that can block the flow of urine

You can learn techniques to reduce high BUN levels by reading this 100 page eBook. This book is written by a patient himself and reviewed by the doctors of Medchunk. Read eBook here.

Normal range of BUN found among women :6-20 mg/dL

Ideal values of BUN depending on age (female) :

Age	Ideal BUN value
<5 years	6.396
5-10 years	6.818
10-15 years	7.267
15-20 years	7.746
20-25 years	8.257
25-30 years	8.801
30-35 years	9.381
35-40 years	9.999
40-45 years	10.658
45-50 years	11.361
50-55 years	12.11
55-60 years	12.908
60-70 years	13.759
70-80 years	14.666
80-90 years	15.633
90-100 years	16.664
>100 years	17.762

If you take a BUN blood test and the results are not in the normal range (6-20 mg/dL), your physician may recommend more tests to figure out the problem. You might also get this test if your physician thinks you have some other disease.

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How the BUN Test Is Done :

When your doctor orders a BUN test, it involves a straightforward blood draw to measure your BUN levels. A pathologist or lab technician will take a small sample of blood from a vein using a needle. Your BUN test results are usually available within a few hours.

Medical References

• Mayo Clinic – Blood urea nitrogen (BUN) test
• MedlinePlus – BUN (Blood Urea Nitrogen)
• Cleveland Clinic – Blood Urea Nitrogen (BUN): Testing, Levels & Indication

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