The three main cerebral infarcts include hypertension, hyperlipidemia and hyperglycemia. Cerebral infarction can be clinically divided into atherosclerotic thrombotic cerebral infarction, lacunar cerebral infarction, cerebral watershed infarction and cerebral embolism according to the different causes of its onset. Atherosclerotic thrombotic cerebral infarction is the most common type of cerebral infarction in clinical practice, and the main etiologies include hypertension, hyperlipidemia and hyperglycemia. Patients with hypertension, due to long-term elevation of blood pressure, can damage the intima of blood vessels, which can easily cause the accumulation of tangible components in blood in the vessel wall, thus can lead to lumen narrowing and stiffening of the vessel wall, which can reduce the elasticity of blood vessels, which can make the blood supply to the brain impaired, thus causing cerebral ischemia and hypoxia, leading to cerebral infarction. Patients with high blood lipids and high blood sugar have increased blood viscosity, which can easily cause atherosclerosis, which can slow down blood flow and easily cause impaired blood supply to the brain, and lead to cerebral infarction. In addition, other causes of cerebral infarction include hyperhomocysteinemia as well as dislodged emboli in the heart, and various causes of hypotension and shock.