Platelet count 320×10^9/L does not require special treatment, and regular rechecking of blood routine is sufficient. 1. Platelet count 320×10^9/L belongs to a mild increase, which may be due to physiological reasons. The reference range of platelet count is (100~300)×10^9/L. Some normal people may have increased platelet count after strenuous exercise or after childbirth. 2. Platelet count in pathological conditions usually exceeds 450×10^9/L, including hematologic and non-hematologic diseases. A common cause of chronic thrombocytosis in middle-aged and elderly people is primary thrombocythemia, a myeloproliferative disorder characterized by weakness and fatigue, often with a history of recurrent thrombosis or bleeding. 3. Infection: Acute infection and inflammation can also lead to elevated platelet reactivity, which can be normalized after controlling the infection. It is recommended to review the routine blood test. If the platelets are persistently high, it is necessary to consult the hematology department for further examination.