ESR normal range
ESR measures how quickly red cells settle in a tube. It rises with inflammation, but it does not show where the problem is.
Check your ESR
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Normal ESR values
ESR rises naturally with age, so a slightly higher number is common in older adults. The checker above uses the over-50 limits, so if you are younger, compare your result with the lower limit here.
| Group | Usual upper limit |
|---|---|
| Men under 50 | 15 mm/hr |
| Men over 50 | 20 mm/hr |
| Women under 50 | 20 mm/hr |
| Women over 50 | 30 mm/hr |
Common causes of high ESR
- Infections, including tuberculosis.
- Arthritis and other inflammatory conditions.
- Anaemia, pregnancy and kidney disease.
- Less often, some cancers.
What happens next
A raised ESR is a clue, not a diagnosis. Your doctor will look at your symptoms and may order other tests such as a CBC or CRP.
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What is a very high ESR?
A level above 100 mm/hr needs prompt investigation by a doctor, because a serious cause is more likely.
Does a high ESR mean cancer?
Usually not. Infection and inflammation are much more common causes.
Can ESR be normal in illness?
Yes. A normal ESR does not rule out disease.
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