If there is atherosclerosis, it is due to arteriosclerosis and stenosis, resulting in irregularities in the intima and turbulent flow, which leads to increased blood flow, like a collapse inside a river, if there is a collapse, the water will form turbulence, that is, the local blood flow will become faster. The main treatment is to control the development of atherosclerosis. If the stenosis is severe, surgical solutions or interventional solutions may be needed, but the main focus is to control the risk factors and improve the blood supply to the brain to solve the problem of insufficient blood supply to the brain, and the increased blood flow is mainly caused by vertebrobasilar stenosis and atherosclerosis.