What causes high Hematocrit and low RBC?

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

If your Hematocrit is in between 40 % and 50 % and your RBC is in between 4.5 mil/uL and 5.5 mil/uL then you need not worry as these are the normal ranges for Hematocrit and RBC 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 Hematocrit : 40 - 50 %

Ideal values of Hematocrit depending on age :

Age	Ideal Hematocrit value
<5 years	40.684
5-10 years	41.38
10-15 years	42.088
15-20 years	42.808
20-25 years	43.54
25-30 years	44.285
30-35 years	45.042
35-40 years	45.812
40-45 years	46.595
45-50 years	47.392
50-55 years	48.202
55-60 years	49.026
60-70 years	49.864
70-80 years	49.85
80-90 years	49.835
90-100 years	49.82
>100 years	49.806

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

If you want your blood test report to be interpreted by Hematocrit specialist, then you can upload your report. Our Hematocrit expert will provide you with the most accurate interpretation of your blood test results and treatment within 12 hours. Upload blood test report now

1,37,160

Total number of patients treated

Hematocrit treatment - Click to read 10 GOLDEN ARTICLES on Anemia

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

• Damage to the bone marrow
• Kidney failure
• Excessive destruction of red blood cells
• Chronic inflammatory diseases
• Congenital heart disease

If you want your blood test report to be interpreted by Hematocrit specialist, you can upload your report. Our Hematocrit 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 RBC : 4.5 - 5.5 mil/uL

Ideal values of RBC depending on age :

Age	Ideal RBC value
<5 years	4.577
5-10 years	4.655
10-15 years	4.735
15-20 years	4.816
20-25 years	4.898
25-30 years	4.982
30-35 years	5.067
35-40 years	5.154
40-45 years	5.242
45-50 years	5.332
50-55 years	5.423
55-60 years	5.422
60-70 years	5.421
70-80 years	5.42
80-90 years	5.419
90-100 years	5.418
>100 years	5.417

High Hematocrit and low RBC can be caused by a lot of reasons. If you take Hematocrit and RBC blood tests and the results are higher than 50 % for Hematocrit and lower than 4.5 mil/uL for RBC, 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 Hematocrit and RBC Tests Are Done :

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

Medical References

• Cleveland Clinic – Hematocrit Test: What It Is, Levels, and High & Low Range
• Mayo Clinic – Hematocrit test
• MedlinePlus – Hematocrit Test