What does high BUN and CRP mean in blood test?

High BUN and CRP can be caused by numerous problems.

High levels of BUN and CRP in the blood indicate a variety of health problems. If your blood BUN level is between 6 mg/dL to 20 mg/dL and the CRP level is between 0 mg/dL to 3 mg/L, then your body does not have any underlying health problems. But if BUN and CRP levels exceed these levels, you should see a doctor immediately.

Normal BUN range : 6 - 20 mg/dL

Age-wise ideal BUN level in blood:

Age	Ideal BUN value
<5 years	6.081
5-10 years	6.163
10-15 years	6.246
15-20 years	6.331
20-25 years	6.417
25-30 years	6.504
30-35 years	6.592
35-40 years	6.681
40-45 years	6.771
45-50 years	6.863
50-55 years	6.956
55-60 years	7.05
60-70 years	7.145
70-80 years	7.242
80-90 years	7.34
90-100 years	7.439
>100 years	7.54

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

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Normal CRP range : 0 - 3 mg/L

Age-wise ideal CRP level in blood:

Age	Ideal CRP value
<5 years	0.11149
5-10 years	0.113
10-15 years	0.11453
15-20 years	0.11608
20-25 years	0.11765
25-30 years	0.11924
30-35 years	0.12085
35-40 years	0.12249
40-45 years	0.12415
45-50 years	0.12583
50-55 years	0.12753
55-60 years	0.12926
60-70 years	0.13101
70-80 years	0.13278
80-90 years	0.13458
90-100 years	0.1364
>100 years	0.13825

High BUN and CRP levels in the blood can cause a number of health problems. Your GP may recommend follow-up tests to get an important picture of your overall health and well-being. If the results are greater than 20 mg/dL for BUN and more than 3 mg/L for CRP, you may also need some follow-up tests that will help detect the underlying disease early.

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How is a blood test performed in the lab?

Depending on the symptoms you are experiencing, your doctor may order a BUN and CRP test. In most hospitals BUN and CRP results can be obtained within three to six hours after blood is taken. The blood is usually drawn from a vein on the inside of the elbow or the back of the hand. Drink plenty of water before your appointment. If you experience any symptoms that you are concerned about are out of the ordinary, call your doctor immediately.