What causes high WBC and low RBC?

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

If your WBC is in between 4 thou/uL and 11 thou/uL 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 WBC 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 WBC : 4 - 11 thou/uL

Ideal values of WBC depending on age :

Age	Ideal WBC value
<5 years	4.04
5-10 years	4.081
10-15 years	4.122
15-20 years	4.164
20-25 years	4.206
25-30 years	4.248
30-35 years	4.291
35-40 years	4.334
40-45 years	4.378
45-50 years	4.422
50-55 years	4.467
55-60 years	4.512
60-70 years	4.558
70-80 years	4.604
80-90 years	4.651
90-100 years	4.698
>100 years	4.745

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

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

• Infections, most commonly caused by bacteria and some viruses, less commonly by fungi or parasites
• Bone marrow damage
• Overwhelming infections (e.g., sepsis)
• Inflammation or inflammatory conditions such as vasculitis or inflammatory bowel disease
• Myelodysplastic syndrome

If you want your blood test report to be interpreted by WBC specialist, you can upload your report. Our WBC 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	4.545
5-10 years	4.591
10-15 years	4.637
15-20 years	4.684
20-25 years	4.731
25-30 years	4.779
30-35 years	4.827
35-40 years	4.876
40-45 years	4.925
45-50 years	4.975
50-55 years	5.025
55-60 years	5.076
60-70 years	5.127
70-80 years	5.179
80-90 years	5.231
90-100 years	5.284
>100 years	5.337

High WBC and low RBC can be caused by a lot of reasons. If you take WBC and RBC blood tests and the results are higher than 11 thou/uL for WBC 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 WBC and RBC Tests Are Done :

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