Blood sedimentation of 90 mm/h is a significant increase in the number of blood sedimentation, which is generally a pathological condition. Blood sedimentation 90mm/h can be seen in: i. Various serious infectious diseases such as acute pneumonia, acute appendicitis, acute cholecystitis, etc. Due to the acute inflammatory reaction, there will be a significant increase in blood sedimentation, which can reach the level of 90mm/h. Second, various rheumatic diseases, rheumatoid arthritis, systemic lupus erythematosus, dry syndrome and other diseases. As these diseases produce autoantibodies, there will also be a significant increase in blood sedimentation. Third, some special infections, the most common being Mycobacterium tuberculosis infection such as pulmonary tuberculosis, tuberculosis pleurisy, bone tuberculosis, etc., may result in abnormally high blood sedimentation. Various tumor diseases, including liver cancer, lung cancer and so on. Especially in patients with multiple myeloma, the blood sedimentation may increase abnormally and may reach 90mm/h.