What causes high Calcium and low BUN?

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

If your Calcium is in between 8.5 mg/dL and 10.1 mg/dL and your BUN is in between 6 mg/dL and 20 mg/dL then you need not worry as these are the normal ranges for Calcium and BUN 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 Calcium : 8.5 - 10.1 mg/dL

Ideal values of Calcium depending on age :

Age	Ideal Calcium value
<5 years	8.62
5-10 years	8.742
10-15 years	8.865
15-20 years	8.99
20-25 years	9.117
25-30 years	9.246
30-35 years	9.376
35-40 years	9.508
40-45 years	9.642
45-50 years	9.778
50-55 years	9.916
55-60 years	10.056
60-70 years	10.054
70-80 years	10.052
80-90 years	10.05
90-100 years	10.048
>100 years	10.046

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

If you want your blood test report to be interpreted by Calcium specialist, then you can upload your report. Our Calcium 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 Calcium levels include:

• Overactive parathyroid glands
• Some Medications like thiazide diuretics
• Kidney failure.
• Lung diseases
• Taking too much of vitamin D supplements

If you want your blood test report to be interpreted by Calcium specialist, you can upload your report. Our Calcium 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 range of BUN : 6 - 20 mg/dL

Ideal values of BUN depending on age :

Age	Ideal BUN value
<5 years	6.085
5-10 years	6.171
10-15 years	6.258
15-20 years	6.346
20-25 years	6.435
25-30 years	6.526
30-35 years	6.618
35-40 years	6.711
40-45 years	6.806
45-50 years	6.902
50-55 years	6.999
55-60 years	7.098
60-70 years	7.198
70-80 years	7.299
80-90 years	7.402
90-100 years	7.506
>100 years	7.612

High Calcium and low BUN can be caused by a lot of reasons. If you take Calcium and BUN blood tests and the results are higher than 10.1 mg/dL for Calcium and lower than 6 mg/dL for BUN, 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 Calcium and BUN Tests Are Done :

If your doctor wants Calcium and BUN tests on you, you may need to go through these tests. During the Calcium and BUN 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 Calcium and BUN Test reports by your pathologist.