Low platelets can be treated with immunoglobulin, especially in patients with immune thrombocytopenic purpura, and is a very effective treatment for this disease. Because the cause of immune thrombocytopenic purpura is the combination of autoantibodies produced by the body with platelets, which leads to the destruction of platelets in the spleen, causing the reduction of platelets in peripheral blood and a series of bleeding symptoms. Immunoglobulin can selectively block the receptors for autoantibodies to bind to platelets, thus preventing platelet destruction and increasing the number of platelets. For other diseases caused by thrombocytopenia may not necessarily apply immunoglobulin treatment, such as aplastic anemia, caused by thrombocytopenia and leukemia chemotherapy caused by thrombocytopenia, caused by the injury of bone marrow hematopoietic stem cells, when the application of immunoglobulin treatment is not very effective.