High platelet count refers to the number of platelets in peripheral blood exceeding the normal range. Generally, high platelet count is most likely to induce thrombosis and embolic diseases, such as cerebral thrombosis, cerebral infarction, myocardial infarction, coronary artery disease, lower extremity venous thrombosis, pulmonary artery embolism, etc. Because platelets themselves have the function of coagulation and aggregation, they are able to form blood clots. If the patient has high blood pressure, high blood sugar, high blood fat and other high-risk factors, after the platelet count increases, thrombotic diseases are more likely to occur, especially in elderly patients. Therefore, if patients with the above-mentioned underlying diseases have increased platelets, they need to take anti-platelet medication in a timely manner, including aspirin and Bolivar. In addition, if the platelet count is severely increased, the aggregated platelets will cause some damage to the endothelial cells of blood vessels, sometimes if bleeding symptoms occur, especially manifested as bleeding from the nose and gums.