What causes high BUN and low MCH?

High BUN and low MCH can be caused by many reasons.

If your BUN is in between 6 mg/dL and 20 mg/dL and your MCH is in between 27 pg and 32 pg then you need not worry as these are the normal ranges for BUN and MCH respectively. But if your levels are lesser or greater than the above values, then there may be some problem in your body.

Normal range of BUN : 6 - 20 mg/dL

Ideal values of BUN depending on age :

Age	Ideal BUN value
<5 years	6.06
5-10 years	6.121
10-15 years	6.183
15-20 years	6.245
20-25 years	6.308
25-30 years	6.371
30-35 years	6.435
35-40 years	6.5
40-45 years	6.565
45-50 years	6.631
50-55 years	6.698
55-60 years	6.765
60-70 years	6.833
70-80 years	6.902
80-90 years	6.971
90-100 years	7.041
>100 years	7.112

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

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Normal range of MCH : 27 - 32 pg

Ideal values of MCH depending on age :

Age	Ideal MCH value
<5 years	27.272
5-10 years	27.546
10-15 years	27.823
15-20 years	28.103
20-25 years	28.386
25-30 years	28.672
30-35 years	28.96
35-40 years	29.251
40-45 years	29.545
45-50 years	29.842
50-55 years	30.142
55-60 years	30.445
60-70 years	30.751
70-80 years	31.06
80-90 years	31.372
90-100 years	31.688
>100 years	31.685

High BUN and low MCH can be caused by a lot of reasons. If you take BUN and MCH blood tests and the results are higher than 20 mg/dL for BUN and lower than 27 pg for MCH, your physician may recommend more tests to figure out the problem. You might also get these tests if your physician thinks you have some other disease.

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How the BUN and MCH Tests Are Done :

If your doctor wants BUN and MCH tests on you, you may need to go through these tests. During the BUN and MCH blood tests, a pathologist will put a needle into your veins and take out a small quantity of blood. A pathologist is a physician in the medical field who thoroughly studies the causes and effects of disease. Within a few hours you will get your BUN and MCH Test reports by your pathologist.

Medical References

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