Platelets (80 to 90) x 10^9/L are mildly low and usually do not cause serious complications, but medical attention is recommended to clarify the cause. Platelet count is one of the items of blood routine, and the normal range is 100 to 300×10^9/L. Platelet count below 100×10^9/L is diagnosed as thrombocytopenia. When it is below 30 x 10^9/L, the risk of bleeding is significantly increased. When the platelet is (80 to 90) × 10^9/L, it is mild thrombocytopenia, and when there is no surgery or trauma, and when you do not engage in work or activities that have a risk of trauma, the risk of bleeding is relatively small, and usually does not require special treatment, and can be followed up for observation. Common causes of low platelets include aplastic anemia, platelet production disorder caused by leukemia, immune thrombocytopenia, lymphoma, rubella and other causes of platelet destruction and increased consumption. It is recommended to consult a doctor, under the guidance of a professional doctor, improve the bone marrow image, serology, platelet function test, etc., to clarify the cause of thrombocytopenia, and follow the doctor’s instructions for treatment.