Sedimentation Rate-Westergren (ESR)

The Erythrocyte Sedimentation Rate, or ESR, is a simple blood test often used to check for inflammation. When inflammation is present, your red blood cells tend to clump together, causing them to sink faster than usual in a test tube—and that's exactly what the Westergren method measures. This key insight can help providers screen for a range of conditions, including autoimmune disorders, infections, and certain forms of arthritis. While it won't pinpoint a specific disease, the ESR provides crucial data about internal activity. It is a vital tool for monitoring inflammatory conditions or investigating symptoms like unexplained fever or headaches.