There are various causes of cerebral infarction, the most important of which is the narrowing of blood vessels due to various lesions, such as atherosclerosis or arteritis, etc.; followed by the formation of blood clots from various causes, such as the rupture of plaque formed by atherosclerosis, the shedding of cardiac emboli formed by atrial fibrillation; there are also some causes due to insufficient cerebral blood perfusion, hypercoagulable state of blood, etc. Atherosclerosis is the most important cause of cerebral infarction. The huge plaque formed by atherosclerosis can directly cause serious narrowing of arteries and then lead to occlusion, and the narrowing of blood vessels will lead to a decrease in blood flow, resulting in decreased perfusion and slowed blood flow in distal arteries, which will further form thrombus and cerebral infarction; there is also a part of unstable plaque, which will lead to the destruction of the intima of blood vessels and then trigger platelet aggregation locally to form thrombus; or cause lipids in the plaque The rupture of the inner nucleus, the dislodged plaque is carried away by the blood flow and blocked in the distal vessels, forming an embolism. The emboli formed by atrial fibrillation are also an important factor. Atrial fibrillation refers to the irregular beating of the atria, in this case, the blood cannot completely flow from the atria to the ventricles, and the blood is stagnant, leading to the formation of the attached thrombus, which is unstable and easily dislodged to form an embolus with the blood flow forward to block the small vessels, and if it is blocked in the cerebral artery, a cerebral infarction is formed, and this type of cerebral infarction is called cardiogenic embolism. The blood itself, due to a variety of factors such as autoimmunity, can also lead to the formation of blood clots and the formation of cerebral infarction. In addition, there are all other rare factors and unexplained causes of cerebral infarction. In summary, the causes of cerebral infarction are complex, of which the most common and important cause is atherosclerosis. In the treatment process of cerebral infarction, the causes must first be distinguished in order to carry out targeted treatment.