What causes high RDW SD and low MCH?

High RDW SD and low MCH can be caused by many reasons.

If your RDW SD is in between 39 fL and 46 fL and your MCH is in between 27 pg and 32 pg then you need not worry as these are the normal ranges for RDW SD and MCH 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 SD : 39 - 46 fL

Ideal values of RDW SD depending on age :

Age	Ideal RDW SD value
<5 years	39.665
5-10 years	40.342
10-15 years	41.03
15-20 years	41.73
20-25 years	42.442
25-30 years	43.166
30-35 years	43.902
35-40 years	44.651
40-45 years	45.413
45-50 years	45.4
50-55 years	45.387
55-60 years	45.373
60-70 years	45.36
70-80 years	45.347
80-90 years	45.334
90-100 years	45.32
>100 years	45.307

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

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

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

If you want your blood test report to be interpreted by RDW SD specialist, you can upload your report. Our RDW SD 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 MCH : 27 - 32 pg

Ideal values of MCH depending on age :

Age	Ideal MCH value
<5 years	27.461
5-10 years	27.929
10-15 years	28.405
15-20 years	28.89
20-25 years	29.383
25-30 years	29.884
30-35 years	30.394
35-40 years	30.913
40-45 years	31.44
45-50 years	31.976
50-55 years	31.967
55-60 years	31.957
60-70 years	31.948
70-80 years	31.939
80-90 years	31.93
90-100 years	31.921
>100 years	31.912

High RDW SD and low MCH can be caused by a lot of reasons. If you take RDW SD and MCH blood tests and the results are higher than 46 fL for RDW SD and lower than 27 pg for MCH, 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 SD and MCH Tests Are Done :

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