The etiology of cerebral atherosclerosis is as follows: 1, abnormal lipid metabolism: gradual deposition of fatty metabolites in the blood vessel wall, forming fibrinoid changes, leading to vascular sclerosis, and in severe cases, occlusion; 2, high blood pressure: long-term increase in blood pressure causes fibrinoid changes in the walls of small arteries, leading to cerebral arterial atherosclerotic changes; 3, abnormal lipid metabolism and high blood pressure interact with each other: high blood pressure can have a long-term effect on the small blood vessels, causing Inflammation occurs in the endothelium of the blood vessel wall. Endothelial damage can cause lipid metabolites to be deposited in the endothelium, resulting in vascular sclerotic changes; 4, bad dietary habits: such as smoking, drinking alcohol, can cause atherosclerotic changes in the brain; 5, obesity: abnormal visceral fat metabolism, abnormal deposition of cerebral blood vessels, cardiovascular abnormalities, pathologic changes, leading to vascular sclerosis atherosclerotic changes.