The main causes of low platelet production are as follows: a. Decreased platelet production. Common blood system diseases, such as aplastic anemia, acute leukemia, and myelodysplastic syndrome, can cause a decrease in platelet production. In addition, various kinds of radiotherapy and chemotherapy can also destroy platelets and cause thrombocytopenia. Second, acute infection, especially special pathogenic bacteria can cause abnormal platelet production. Third, abnormal immune system, such as primary immune thrombocytopenia, which often occurs in women. Excessive platelet destruction, such as hypersplenism can lead to reduced platelet values. V. Excessive platelet depletion, such as diffuse intravascular coagulation. In addition, it may also occur in pregnant women vitamin and folic acid deficiency, as well as long-term antibiotic use can also lead to reduced platelets.