Inflammation
ESR
LOINC 30341-2 · mm/h
What it is
ESR (erythrocyte sedimentation rate) measures how fast red blood cells settle in a tube — a simple, indirect sign of inflammation.
Why it matters
It is a general marker of inflammation, useful for detecting and monitoring inflammatory conditions over time.
What high values can mean
A higher value suggests inflammation somewhere in the body, from infection to autoimmune conditions; it also rises with age.
What low values can mean
A lower value is generally normal.
How to improve it
ESR follows the underlying inflammation; treating the cause brings it down.
Food & lifestyle
An anti-inflammatory lifestyle supports lower baseline inflammation, but ESR mainly reflects an active process.
Preparing for the test
A blood test; fasting is not required — follow your lab's instructions.
When to talk to a doctor
A raised ESR is interpreted by a doctor with CRP and your symptoms to find the cause.
Related markers
Sources
- MedlinePlus (NIH)
- Testing.com (AACC)
Content reviewed on June 26, 2026
Medical disclaimer
This content is for educational purposes only. It is not medical advice and does not diagnose, treat, or prevent any condition. Reference ranges vary between laboratories — always use the range printed on your report and discuss your results with a healthcare professional.
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