The reasons for the recurrence of cerebral infarction include high blood pressure variability, high blood sugar, dehydration, etc., which are as follows: 1) high blood pressure variability: the blood pressure is high and low, which is easy to trigger. 2) high blood sugar: type 2 diabetic patients with high blood sugar are prone to the recurrence of cerebral infarction. 3) dehydration: for example, acute diarrhea leads to the situation of dehydration, or sweating too much in summer, and the human body is prone to recurring cerebral infarction with the increased blood viscosity. 4) excessive emotional stress: excessive spasm of human head vessels can also trigger cerebral infarction. 5) others: high blood lipid, obesity and other reasons are the risk factors for the recurrence of cerebral infarction. Excessive emotion: excessive spasm of blood vessels in the human head can induce cerebral infarction. 5, other: high blood fat, obesity and other reasons are the risk factors for the recurrence of cerebral infarction, as well as excessive fatigue or sudden cold and other reasons.