What causes high MCH and low RDW SD?

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

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

Ideal values of MCH depending on age :

Age	Ideal MCH value
<5 years	27.729
5-10 years	28.478
10-15 years	29.247
15-20 years	30.037
20-25 years	30.848
25-30 years	31.681
30-35 years	31.658
35-40 years	31.635
40-45 years	31.612
45-50 years	31.589
50-55 years	31.566
55-60 years	31.543
60-70 years	31.52
70-80 years	31.497
80-90 years	31.474
90-100 years	31.451
>100 years	31.428

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

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

• An overactive thyroid gland
• Complications from an infection
• An autoimmune disease
• Thalassemia, an inherited blood disorder
• Liver diseases

If you want your blood test report to be interpreted by MCH specialist, you can upload your report. Our MCH 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 RDW SD : 39 - 46 fL

Ideal values of RDW SD depending on age :

Age	Ideal RDW SD value
<5 years	40.053
5-10 years	41.134
10-15 years	42.245
15-20 years	43.386
20-25 years	44.557
25-30 years	45.76
30-35 years	45.727
35-40 years	45.694
40-45 years	45.661
45-50 years	45.628
50-55 years	45.595
55-60 years	45.562
60-70 years	45.529
70-80 years	45.496
80-90 years	45.462
90-100 years	45.428
>100 years	45.395

High MCH and low RDW SD can be caused by a lot of reasons. If you take MCH and RDW SD blood tests and the results are higher than 32 pg for MCH and lower than 39 fL for RDW SD, 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 MCH and RDW SD Tests Are Done :

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