The ESR (Erythrocyte Sedimentation Rate) Test, also known as the Westergren sedimentation rate test, measures the rate at which red blood cells settle in a test tube. Elevated ESR levels indicate inflammation, which could be due to infections, autoimmune conditions, or certain cancers. While not specific to any illness, this test helps identify underlying inflammation that may require further investigation.

The ESR test is a non-specific marker of inflammation. High ESR levels may indicate infections, autoimmune disorders (such as lupus or rheumatoid arthritis), or chronic illnesses like tuberculosis. While elevated levels suggest the presence of inflammation, they must be correlated with other diagnostic tests and clinical symptoms for accurate diagnosis.

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