What causes high RBC and low MCHC?

High RBC and low MCHC can be caused by many reasons.

If your RBC is in between 4.5 mil/uL and 5.5 mil/uL and your MCHC is in between 31.5 g/dL and 34.5 g/dL then you need not worry as these are the normal ranges for RBC and MCHC respectively. But if your levels are lesser or greater than the above values, then there may be some problem in your body.

Some examples of conditions that can increase or decrease RBC levels include:

• Sudden (acute) or chronic bleeding from the digestive tract
• Kidney failure—severe and chronic kidney diseases lead to decreased production of erythropoietin
• Bone marrow damage
• Conditions that cause red blood cells to be destroyed, such as hemolytic anemia caused by autoimmunity or defects in the red cell itself
• Chronic bleeding from the digestive tract

RBC treatment - Click to read 10 GOLDEN ARTICLES on Anemia

Normal range of RBC : 4.5 - 5.5 mil/uL

Ideal values of RBC depending on age :

Age	Ideal RBC value
<5 years	4.667
5-10 years	4.84
10-15 years	5.019
15-20 years	5.205
20-25 years	5.398
25-30 years	5.391
30-35 years	5.383
35-40 years	5.375
40-45 years	5.368
45-50 years	5.361
50-55 years	5.353
55-60 years	5.346
60-70 years	5.339
70-80 years	5.332
80-90 years	5.324
90-100 years	5.317
>100 years	5.31

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

Normal range of MCHC : 31.5 - 34.5 g/dL

Ideal values of MCHC depending on age :

Age	Ideal MCHC value
<5 years	32.666
5-10 years	33.875
10-15 years	33.828
15-20 years	33.782
20-25 years	33.736
25-30 years	33.69
30-35 years	33.644
35-40 years	33.598
40-45 years	33.552
45-50 years	33.506
50-55 years	33.46
55-60 years	33.414
60-70 years	33.368
70-80 years	33.323
80-90 years	33.277
90-100 years	33.231
>100 years	34.461

High RBC and low MCHC can be caused by a lot of reasons. If you take RBC and MCHC blood tests and the results are higher than 5.5 mil/uL for RBC and lower than 31.5 g/dL for MCHC, 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 RBC and MCHC Tests Are Done :

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

Medical References

• MedlinePlus – Red Blood Cell (RBC) Count
• WebMD – Red Blood Cell (RBC) Count Test: Results and What They Mean
• MedlinePlus – Red Blood Cell (RBC) Indices