A platelet count of (70 to 80) × 10⁹/L is a mild decrease and requires treatment based on the primary disease. Some of them can be treated without treatment, and close observation is sufficient. Some of them need to be given treatment, such as blood transfusion, aminoglycolic acid, globulin, hematopoietic stem cell transplantation, and other hemostatic, immunosuppressive, and surgical treatments when accompanied by symptoms such as bleeding and aplastic anemia. There are many causes of thrombocytopenia, such as aplastic anemia, leukemia, lupus erythematosus, bleeding and other factors can lead to thrombocytopenia. The normal platelet count in the body is (100-300) × 10⁹/L, mild thrombocytopenia when the value (50-100) × 10⁹/L, greater than 50 × 10⁹/L or (30-50) × 10⁹/L, often not be accompanied by a tendency to bleed, and a few skin petechiae and ecchymoses are occasionally seen at (30 to 50) × 10⁹/L. Platelets (70 to 80) × 10⁹ / L need to specify the part, part of the clinical close observation can be. If thrombocytopenia is accompanied by bleeding, aplastic anemia and other symptoms need to be given to the cause of the treatment, such as blood transfusion, aminoglycolic acid hemostasis, cyclosporine and globulin immunosuppressive drugs, hematopoietic stem cell transplantation surgical treatment. Platelets (70-80) × 10⁹ / L alone can not accurately determine the cause, but also need to be combined with the characteristics of the medical history, other test results to make an accurate judgment, it is recommended that the cause of the disease under the guidance of the doctor before giving treatment, do not use their own medication.