ESR Test
- Category
- Inflammation
- Sample
- Blood sample taken from a vein in your arm
- Reports () Terms & Conditions Report time varies with time of sample collection.
- In 2 days
- Fasting
- No Fasting
- Age
- 5+ Years
What Is This Test?
ESR (Erythrocyte Sedimentation Rate) measures how quickly red blood cells settle at the bottom of a tube in one hour.
Why this test is performed?
A non-specific marker of inflammation — raised in infections (including TB), autoimmune conditions such as rheumatoid arthritis, and some cancers. Used to support diagnosis and to track disease activity.
Who should take this test?
Fever, infection, joint pain or inflammatory conditions, and to monitor treatment.
Test Preparation
No fasting needed.
Medical disclaimer · for information only, not medical advice
This article is for general information and education only. It is not medical advice, does not create a doctor–patient relationship, and is not a substitute for consultation with a qualified doctor who has assessed your individual situation. Never delay seeking medical advice because of something you have read here.
In a medical emergency, call 112, or 108 for an ambulance where that service operates, or go to your nearest emergency department. If you are in mental health distress, Tele-MANAS is free and available 24×7 on 14416.
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Frequently asked questions
No. It only signals inflammation somewhere in the body. ESR also rises naturally with age, in women and during pregnancy, so it is read along with other tests.
No fasting is needed. You can eat and drink normally unless your doctor has advised otherwise.
Blood sample taken from a vein in your arm.
Usually within 10–34 hours after the sample reaches the lab. You will receive the report online.
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