ESR is medically known as erythrocyte sedimentation rate, or hematocrit for short, and refers to the rate at which red blood cells settle under certain conditions, as a result of the interaction of earth gravity, plasma buoyancy and blood composition. Blood sedimentation and other test results are commonly used clinically to determine disease attributes, but the normal range is different for males and females due to differences in plasma viscosity, etc. For normal adult males, the normal range of blood sedimentation is 0-15 mm/h, and for normal adult females, the normal range of blood sedimentation is 0-20 mm/h. Accelerated and slowed blood sedimentation are related to the following factors, respectively: 1. Accelerated blood sedimentation: infants, children, Physiological accelerated blood sedimentation can occur in menstruating women, those who are more than 3 months pregnant, etc. At this time, it is not related to disease and no special treatment is necessary. Pathologically accelerated sedimentation is common in rheumatic immune diseases, bacterial infections, neoplastic diseases and endocrine diseases, such as tuberculosis, anemia, rheumatoid arthritis, pelvic inflammatory disease, diabetes, hyperthyroidism, myeloma, etc.; 2. Slowed sedimentation: When true erythrocytosis, severe anemia, allergies and other diseases occur, the examination will show a slowed sedimentation phenomenon. In addition, the fast and slow blood sedimentation can also understand the changes of the disease and correlate with the disease activity. Therefore, when pathological blood sedimentation changes occur in clinical examination, further detailed examination should be conducted to find the cause of the disease and actively treat the original disease. Life should be diligent exercise, less salt diet, etc.