Common causes of thrombocytopenia include immune thrombocytopenic purpura, drug effects, hematopoietic system diseases, etc. The specific needs to be judged in conjunction with the patient’s personal situation, and timely consultation is recommended. 1. Immune thrombocytopenic purpura, viral infections and autoimmune diseases can cause thrombocytopenia. 2. Certain medications can cause thrombocytopenia in the body. For example, aminopyrine, sulfonamide, chloramphenicol and other commonly used drugs will cause the body to produce anti-platelet antibodies through the immune mechanism when they act or when they are infected, resulting in a decrease in the number of platelets in the body. 3. Certain hematopoietic systemic diseases, such as myelodysplastic syndrome and aplastic anemia, can cause thrombocytopenia. 4. Neoplastic diseases can cause bone marrow invasion, which in turn causes thrombocytopenia. There are many causes of thrombocytopenia, if there are uncomfortable symptoms, patients should go to the hospital in time to receive examination and treatment.