Is BUN 93 high, normal or dangerous? What does Blood urea nitrogen level 93 mean?

📅 Medical Review Date: January 10, 2026

Your BUN level of 93 is a High BUN level.

A BUN level of 93 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	6.558
5-10 years	7.168
10-15 years	7.835
15-20 years	8.564
20-25 years	9.36
25-30 years	10.23
30-35 years	11.181
35-40 years	12.221
40-45 years	13.358
45-50 years	14.6
50-55 years	15.958
55-60 years	17.442
60-70 years	19.064
70-80 years	18.899
80-90 years	18.736
90-100 years	18.574
>100 years	18.413

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

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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

Receive world-class medical opinion about your high BUN levels over email.Upload blood test report now

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	6.575
5-10 years	7.205
10-15 years	7.895
15-20 years	8.651
20-25 years	9.48
25-30 years	10.388
30-35 years	11.383
35-40 years	12.473
40-45 years	13.668
45-50 years	14.977
50-55 years	16.412
55-60 years	17.984
60-70 years	19.707
70-80 years	19.526
80-90 years	19.346
90-100 years	19.168
>100 years	18.992

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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