1, people with a family history of cerebral infarction; 2, hypertension and some low blood pressure patients; 3, patients with cerebral atherosclerosis; 4, hyperviscosity (refers to fibrinogen, lipids, red blood cell increase, hypercoagulability and other reasons for the increased viscosity of the blood) and patients with increased blood lipids; 5, pre-thrombotic state (refers to the history of a one-time cerebral ischemic attack or anginal attack, etc.); 6, patients with diabetes mellitus; 7, patients with obesity; 8, low-fibrinolysis (refers to a decline in their own function of dissolving thrombus); 9, old age; 10, a large number of people who smoke.