Whether the blood sedimentation 20mm/h is normal or not is related to the reference value of the blood sedimentation test method. If the normal range of blood sedimentation is less than 20mm/h, blood sedimentation 20mm/h is a normal high value and can be reviewed to clarify. Increased sedimentation is often associated with the following diseases: 1) inflammatory diseases, such as various bacterial infections; 2) various acute systemic or localized infections, such as active tuberculosis, myocarditis, pelvic inflammatory disease, nephritis, etc.; 3) various connective tissue diseases, such as rheumatoid arthritis, systemic lupus erythematosus, vasculitis, etc.; 4) tissue damage and necrosis, such as extensive tissue necrosis and damage, pulmonary infarction, heart attack, fracture, severe trauma, burns, etc.; 5) the normal range of blood sedimentation is less than 20mm/h, Severe trauma, burns, etc.; 5, suffering from severe anemia, blood diseases, chronic hepatitis, cirrhosis multiple myeloma, hyperthyroidism, malignant lymphoma, etc. can all appear increased blood sedimentation.