Keywords: idiopathic thrombocytopenic purpura, immune thrombocytopenia, flow cytometry, T/B lymphocyte subsets, idiopathic thrombocytopenic purpura (ITP) is a bleeding disorder characterized by a persistent decrease in peripheral blood platelets and a normal or increased number of bone marrow megakaryocytes with impaired maturation due to the production of anti-self-platelet antibodies in the patient. It is a bleeding disorder characterized by a persistent decrease in peripheral blood platelets and a normal or increased number of bone marrow megakaryocytes with impaired maturation due to the production of anti-platelet antibodies in the patient. Modern research shows that it is an immune-mediated thrombocytopenic syndrome, so it is also called autoimmune thrombocytopenic purpura (ITP). In 2008, the International Collaborative Group on ITP changed the name from “immune thrombocytopenic purpura” to “immune thrombocytopenia”, which is the most common clinical thrombocytopenic disease, accounting for about 30% of all bleeding disorders. In 2008, the International Collaborative Group on ITP changed the name from “immune thrombocytopenic purpura” to “immune thrombocytopenia”, and the abbreviation remains ITP.