Erythrocyte sedimentation rate, or hematocrit for short. The sedimentation rate is 0-15 mm/h for adult males and 0-20 mm/h for adult females, and exceeds the normal range, often due to various pathological conditions, including acute infections and inflammatory diseases that can cause a significant increase in sedimentation. In addition, various rheumatic diseases, such as systemic lupus erythematosus, rheumatoid arthritis and dry syndrome, may cause a significant increase in blood sedimentation. When rheumatic activity is controlled, the rate of blood sedimentation will also slow down. In addition, tuberculosis infections, such as pulmonary tuberculosis, tuberculous pleurisy and lumbar spine tuberculosis. The hematocrit also increases significantly, and in most patients with malignant tumors, the hematocrit also increases significantly. The erythrocyte sedimentation rate is not specific, but only a markedly increased sedimentation rate often indicates a pathological state of the body and requires active identification of the cause.