What does high RBC and RDW SD mean in blood test?

High RBC and RDW SD can be caused by numerous problems.

High levels of RBC and RDW SD in the blood indicate a variety of health problems. If your blood RBC level is between 4.5 mil/uL to 5.5 mil/uL and the RDW SD level is between 39 mil/uL to 46 fL, then your body does not have any underlying health problems. But if RBC and RDW SD levels exceed these levels, you should see a doctor immediately.

Normal RBC range : 4.5 - 5.5 mil/uL

Age-wise ideal RBC level in blood:
Age Ideal RBC value
<5 years 4.68
5-10 years 4.867
10-15 years 5.062
15-20 years 5.264
20-25 years 5.475
25-30 years 5.466
30-35 years 5.458
35-40 years 5.449
40-45 years 5.44
45-50 years 5.432
50-55 years 5.423
55-60 years 5.414
60-70 years 5.406
70-80 years 5.397
80-90 years 5.388
90-100 years 5.38
>100 years 5.371

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

Your RBC result may be wrong. Click to know the reason in detail

Click here to know Symptoms of High RBC

Click here to know Symptoms of High RDW SD

Besides Lab test failures, there are many other reasons for inaccurate blood results. Know the common reasons for inaccurate blood test results

Can Low or High RBC cause Heart Attack? Click here to know

Normal RDW SD range : 39 - 46 fL

Age-wise ideal RDW SD level in blood:
Age Ideal RDW SD value
<5 years 40.56
5-10 years 42.182
10-15 years 43.869
15-20 years 45.624
20-25 years 45.551
25-30 years 45.478
30-35 years 45.405
35-40 years 45.332
40-45 years 45.259
45-50 years 45.186
50-55 years 45.113
55-60 years 45.041
60-70 years 44.969
70-80 years 44.897
80-90 years 44.825
90-100 years 44.753
>100 years 44.681

Click here to know Symptoms of High RBC

Click here to know Symptoms of High RDW SD

Can Low or High RBC cause Heart Attack? Click here to know

Click here to upload your blood test report

Click here to consult a doctor for your Low RBC problem

High RBC and RDW SD levels in the blood can cause a number of health problems. Your GP may recommend follow-up tests to get an important picture of your overall health and well-being. If the results are greater than 5.5 mil/uL for RBC and more than 46 fL for RDW SD, you may also need some follow-up tests that will help detect the underlying disease early.

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How is a blood test performed in the lab?

Depending on the symptoms you are experiencing, your doctor may order a RBC and RDW SD test. In most hospitals RBC and RDW SD results can be obtained within three to six hours after blood is taken. The blood is usually drawn from a vein on the inside of the elbow or the back of the hand. Drink plenty of water before your appointment. If you experience any symptoms that you are concerned about are out of the ordinary, call your doctor immediately.

Click here to upload your blood test report

Click here to consult a doctor for your Low RBC problem

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