Cerebral infarction is a disease caused by blockage of blood vessels in the brain, the most important is the narrowing of blood vessels caused by lesions of blood vessels from various causes, such as atherosclerosis or arteritis, etc.; the second is the formation of blood clots from various causes, such as the rupture of plaques formed by atherosclerosis, emboli in the heart formed by atrial fibrillation, etc. Atherosclerosis is the most important cause of cerebral infarction. The atherosclerosis of arteries and blood vessels leads to plaque, which is the main factor causing the narrowing of blood vessels, and huge plaque can directly cause the serious narrowing of arteries and then lead to occlusion. These thrombi and dislodged plaques are carried away by the blood flow and blocked in the downstream vessels, forming an embolism. The emboli formed by atrial fibrillation are also an important factor. Atrial fibrillation is an irregular beating of the atria. In this case, the blood cannot completely beat from the atria into the ventricles, and the blood is stagnant, leading to the formation of thrombi. These thrombi, along with the blood flow, reach the brain from the heart, and blockage in the cerebral arteries forms a cerebral infarction, which is called a cardiogenic embolism. The blood itself, due to a variety of factors such as autoimmunity, can also lead to the formation of blood clots and cause occlusion of the cerebral arteries, which is also a factor in the formation of cerebral infarction. Therefore, the causes of the formation of cerebral infarction are complex, of which the most common and important cause is atherosclerosis. In the process of treatment on cerebral infarction, it is necessary to first distinguish the cause in order to carry out targeted treatment.