Learn about the erythrocyte sedimentation rate ( ESR ) test, which measures the speed of red blood cells sinking in a tube. Find out the normal ESR levels by age and gender, the causes of high or low ESR , and the purpose and procedure of the test. We would like to show you a description here but the site won’t allow us. An ESR ( erythrocyte sedimentation rate ) blood test is very useful for detecting inflammation or infections in the body. Learn how ESR is tested, what it is for, and what it means if you have a high ESR or low ESR level
