What causes high BUN and low TSH 3?

High BUN and low TSH 3 can be caused by many reasons.

If your BUN is in between 6 mg/dL and 20 mg/dL and your TSH 3 is in between 0.55 uIU/mL and 4.78 uIU/mL then you need not worry as these are the normal ranges for BUN and TSH 3 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	6.063
5-10 years	6.127
10-15 years	6.191
15-20 years	6.256
20-25 years	6.322
25-30 years	6.388
30-35 years	6.455
35-40 years	6.523
40-45 years	6.592
45-50 years	6.661
50-55 years	6.731
55-60 years	6.802
60-70 years	6.873
70-80 years	6.945
80-90 years	7.018
90-100 years	7.092
>100 years	7.167

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

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Normal range of TSH 3 : 0.55 - 4.78 uIU/mL

Ideal values of TSH 3 depending on age :

Age	Ideal TSH 3 value
<5 years	0.556
5-10 years	0.562
10-15 years	0.568
15-20 years	0.574
20-25 years	0.58
25-30 years	0.586
30-35 years	0.592
35-40 years	0.598
40-45 years	0.604
45-50 years	0.61
50-55 years	0.616
55-60 years	0.622
60-70 years	0.629
70-80 years	0.636
80-90 years	0.643
90-100 years	0.65
>100 years	0.657

High BUN and low TSH 3 can be caused by a lot of reasons. If you take BUN and TSH 3 blood tests and the results are higher than 20 mg/dL for BUN and lower than 0.55 uIU/mL for TSH 3, 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 TSH 3 Tests Are Done :

If your doctor wants BUN and TSH 3 tests on you, you may need to go through these tests. During the BUN and TSH 3 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 TSH 3 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