The sed rate is a simple blood test. You don't need to fast before the test.

Is ESR done empty stomach?

In the defence services, the ESR is usually done on a fasting blood sample, though the manual on laboratory methods does not specify so [3]. The results do not suggest that the ESR may be influenced to such an extent as to cause a significant difference.

What is ESR rest?

An ESR test measures how quickly red blood cells settle to the bottle of a test tube. Inflammation or infection can lead to extra proteins in the blood, which can make the red blood cells settle faster. When this happens, the ESR is higher.