Platelets higher than 1000×10*9/L is a severe increase of platelets, which is very dangerous. The risk of platelets above 1000×10*9/L is manifested in two aspects: first, it is easy to form thrombotic diseases, because platelets have the function of adhesion and aggregation, the platelet count increases after the easy formation of thrombotic diseases, especially the combination of hypertension, hyperlipidemia, hyperglycemia elderly patients, which have the tendency to form thrombotic diseases, platelets above 1000×10*9/L After that, coronary heart disease, myocardial infarction, cerebral thrombosis and other diseases are very likely to occur. Another condition is that platelets above 1000×10*9/L can also cause bleeding symptoms, because a large number of platelets gathered in the blood vessels, causing certain damage to the endothelial cells of the blood vessels, will also cause bleeding symptoms, especially common in the nasal cavity, gum bleeding, serious cases may also cause intracranial bleeding.