Erythrocyte Sedimentation Rate (ESR)
Here’s what it reflects — and what to do about it.
Longetic pulls together every lab and record you’ve had, follows how Erythrocyte Sedimentation Rate (ESR) changes over time, and explains what’s shifting — so you walk into your next appointment prepared, with reminders for retests along the way.
What is Erythrocyte Sedimentation Rate (ESR)?
Measures how quickly red blood cells settle in a tube, giving a general, non-specific signal of inflammation in the body.
ESR measures how far red blood cells fall within a vertical tube over a set period of time. Inflammation causes proteins in the blood to make red blood cells clump together and settle faster, so a higher rate can reflect an active inflammatory process. ESR is a non-specific marker, meaning it can rise with infections, autoimmune conditions, and other inflammatory states without pointing to a particular cause on its own. It is often ordered alongside hs-CRP and symptom evaluation to help detect or monitor conditions such as autoimmune arthritis, vasculitis, or other inflammatory processes. Because many factors, including age, can influence ESR, it is always interpreted within a broader clinical picture.
Lifestyle factors that influence this marker
- Aim for a balanced, anti-inflammatory eating pattern rich in vegetables, fruit, and healthy fats
- Stay physically active with regular moderate exercise
- Prioritize consistent, restorative sleep
- Practice stress-management techniques
- Avoid smoking
- Moderate alcohol intake
Tests often checked alongside this
- hs-CRP — another general inflammation marker often checked alongside
- Complement C3 and C4 — may be reviewed together in suspected autoimmune conditions
- ANA Pattern and ANA Titer — commonly checked if autoimmune disease is suspected
How this can show up in how you look and feel
- May be associated with fatigue
- May be associated with joint pain
- May be associated with unexplained fevers
- May be associated with unintended weight change
What can affect this marker
- Age
- Sex
- Pregnancy
- Infection
- Inflammation
- Medications
- Lab variability between testing methods
What to track over time
- Whether the result trends up or down alongside symptoms over time
- How ESR compares with hs-CRP trends
- Whether repeat testing is considered during suspected flares of a known condition
What to ask your doctor
- How does my ESR result relate to my hs-CRP result?
- Could my age or another factor be influencing this result?
- Should this be tracked over time alongside my symptoms?
- Is any follow-up testing recommended?
This glossary entry is for informational purposes only and is not a substitute for professional medical advice. Read our Terms of Use.
References
About our sources
Official sources
Government health agencies, national institutes, and intergovernmental bodies whose guidelines carry regulatory or policy weight.
Clinical / professional
Medical societies, specialty colleges, and professional associations whose consensus statements reflect clinical practice standards.
Peer-reviewed research
Original research articles and systematic reviews published in indexed journals and verified through PubMed or DOI.