What causes high RDW and low TSH 3?

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

If your RDW is in between 11.6 % and 14 % 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 RDW 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 RDW : 11.6 - 14 %

Ideal values of RDW depending on age :

Age	Ideal RDW value
<5 years	11.891
5-10 years	12.189
10-15 years	12.495
15-20 years	12.809
20-25 years	13.131
25-30 years	13.461
30-35 years	13.799
35-40 years	13.79
40-45 years	13.781
45-50 years	13.772
50-55 years	13.764
55-60 years	13.755
60-70 years	13.746
70-80 years	13.737
80-90 years	13.729
90-100 years	13.721
>100 years	13.712

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

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

• Crohn's disease
• Chronic liver disease
• Thalassemia, an inherited blood disorder
• An iron or vitamin deficiency
• Heart disease

If you want your blood test report to be interpreted by RDW specialist, you can upload your report. Our RDW 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 TSH 3 : 0.55 - 4.78 uIU/mL

Ideal values of TSH 3 depending on age :

Age	Ideal TSH 3 value
<5 years	0.564
5-10 years	0.578
10-15 years	0.593
15-20 years	0.608
20-25 years	0.623
25-30 years	0.639
30-35 years	0.655
35-40 years	0.671
40-45 years	0.688
45-50 years	0.705
50-55 years	0.723
55-60 years	0.741
60-70 years	0.76
70-80 years	0.779
80-90 years	0.799
90-100 years	0.819
>100 years	0.84

High RDW and low TSH 3 can be caused by a lot of reasons. If you take RDW and TSH 3 blood tests and the results are higher than 14 % for RDW 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 RDW and TSH 3 Tests Are Done :

If your doctor wants RDW and TSH 3 tests on you, you may need to go through these tests. During the RDW 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 RDW and TSH 3 Test reports by your pathologist.

Medical References

• Cleveland Clinic – RDW Blood Test: What It Is, Procedure & Results
• MedlinePlus – RDW (Red Cell Distribution Width)
• NIH – High red blood cell distribution width is closely associated with risk of carotid artery atherosclerosis