Hematocrit, i.e. erythrocyte sedimentation rate, refers to the rate of natural sedimentation of erythrocytes in isolated anticoagulated whole blood under certain conditions. The causes of high blood sedimentation are physiological factors, acute inflammation, malignant tumors, etc., as follows. 1. Physiological factors: Increased blood sedimentation may occur during infancy, menstruation, and from pregnancy to a period of time after delivery, which is not related to diseases and does not require special treatment. 2. Acute inflammation: such as acute pneumonia, acute appendicitis, acute cholecystitis, etc., mainly due to the increase of fibrinogen and immunoglobulin, resulting in a significant increase in blood sedimentation. The severity of inflammation can also be determined by blood sedimentation. 3. Malignant tumors: malignant tumors with rapid growth can make the blood sedimentation rise, and when the tumor is controlled, the blood sedimentation will slowly decline. The treatment effect of the tumor can be judged by the blood sedimentation. Elevated blood sedimentation may also be due to other reasons, it is recommended to go to the hospital in time, actively search for the original cause, identify the cause of the disease, and follow the doctor’s instructions for treatment.