A platelet count of 69 x 10^9/L is classified as mildly reduced and is not considered serious. A platelet count of 62 x 10^9/L is considered a mild reduction in platelets, which is usually not accompanied by a tendency to bleed and is generally not serious. Patients with this value can be observed clinically and no treatment is needed for the time being. The normal range of platelet count should be (100-300)×10^9/L. The most common causes of thrombocytopenia are as follows: 1. Immune thrombocytopenic purpura: thrombocytopenia, mucous membrane of the skin and visceral bleeding as the main clinical manifestations. 2. Aplastic anemia: mainly characterized by thrombocytopenia, infection, hemorrhage, anemia and bone marrow hematopoietic hypoplasia. 3. Pharmacological thrombocytopenia: such as taking some radiotherapy drugs can also cause thrombocytopenia. After the platelet 69×10^9/L, the cause of thrombocytopenia should be clarified as soon as possible, and the primary disease should be treated actively.