Higher than normal platelet count can be caused by dehydration and increased platelet count. 1. Dehydration: if the patient has severe vomiting, diarrhea, profuse sweating and other symptoms, the phenomenon of dehydration may occur, due to the decrease in plasma volume, which may cause the platelet count to be higher than normal. 2. Increased platelet count: Increased platelet count can be divided into physiological and pathological increase, which may be caused by pregnancy, exercise, primary thrombocythemia, true erythrocytosis, chronic granulocytic leukemia, etc. Increased platelet count may cause platelet count to be higher than the normal value. When the patient has a platelet ratio higher than normal, it is recommended to consult a doctor in time to identify the cause of the disease, and then standardize the treatment under the guidance of the physician.