Is BUN 55 high, normal or dangerous? What does Blood urea nitrogen level 55 mean?

📅 Medical Review Date: September 27, 2025

Your BUN level of 55 is a High BUN level.

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	6.33
5-10 years	6.678
10-15 years	7.045
15-20 years	7.432
20-25 years	7.841
25-30 years	8.272
30-35 years	8.727
35-40 years	9.207
40-45 years	9.713
45-50 years	10.247
50-55 years	10.811
55-60 years	11.406
60-70 years	12.033
70-80 years	12.695
80-90 years	13.393
90-100 years	14.13
>100 years	14.907

*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	6.34
5-10 years	6.699
10-15 years	7.078
15-20 years	7.479
20-25 years	7.903
25-30 years	8.351
30-35 years	8.824
35-40 years	9.324
40-45 years	9.852
45-50 years	10.41
50-55 years	11
55-60 years	11.623
60-70 years	12.281
70-80 years	12.977
80-90 years	13.712
90-100 years	14.489
>100 years	15.31

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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