What causes high CRP and low FT4 thyroid?

High CRP and low FT4 thyroid can be caused by many reasons.

If your CRP is in between 0 mg/L and 3 mg/L and your FT4 thyroid is in between 0.89 ng/dL and 1.76 ng/dL then you need not worry as these are the normal ranges for CRP and FT4 thyroid 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 CRP : 0 - 3 mg/L

Ideal values of CRP depending on age :

Age	Ideal CRP value
<5 years	0.11385
5-10 years	0.11783
10-15 years	0.12195
15-20 years	0.12622
20-25 years	0.13064
25-30 years	0.13521
30-35 years	0.13994
35-40 years	0.14484
40-45 years	0.14991
45-50 years	0.15516
50-55 years	0.16059
55-60 years	0.16621
60-70 years	0.17203
70-80 years	0.17805
80-90 years	0.18428
90-100 years	0.19073
>100 years	0.19741

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

If you want your blood test report to be interpreted by CRP specialist, then you can upload your report. Our CRP 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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Total number of patients treated

Some examples of conditions that increase or decrease CRP levels include:

• Inflammation
• Suspected bacterial infection
• Lupus
• Crohn disease
• Ulcerative colitis

If you want your blood test report to be interpreted by CRP specialist, you can upload your report. Our CRP 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 FT4 thyroid : 0.89 - 1.76 ng/dL

Ideal values of FT4 thyroid depending on age :

Age	Ideal FT4 thyroid value
<5 years	0.92115
5-10 years	0.95339
10-15 years	0.98676
15-20 years	1.0213
20-25 years	1.05705
25-30 years	1.09405
30-35 years	1.13234
35-40 years	1.17197
40-45 years	1.21299
45-50 years	1.25544
50-55 years	1.29938
55-60 years	1.34486
60-70 years	1.39193
70-80 years	1.44065
80-90 years	1.49107
90-100 years	1.54326
>100 years	1.59727

High CRP and low FT4 thyroid can be caused by a lot of reasons. If you take CRP and FT4 thyroid blood tests and the results are higher than 3 mg/L for CRP and lower than 0.89 ng/dL for FT4 thyroid, 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 CRP and FT4 thyroid Tests Are Done :

If your doctor wants CRP and FT4 thyroid tests on you, you may need to go through these tests. During the CRP and FT4 thyroid 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 CRP and FT4 thyroid Test reports by your pathologist.