Patients with high blood viscosity also have increased blood lipids. High blood viscosity is one of the most important indicators of the nature of flow in the blood. Usually, because the blood flow is slowed down or a large amount of lipids and shed endothelial cells are deposited on the vascular membrane, resulting in narrowing of the vascular lumen and slow blood flow, the blood viscosity will increase and the organism will receive relatively less oxygen and nutrients. When the blood viscosity increases to a certain degree, hyperlipidemia will occur. When the blood lipids are too high, patients will have blood clots that cause vascular tethering or form unstable atherosclerotic plaques that attach to the lumen wall, so patients with high blood viscosity will also have increased blood lipids, which will cause vascular hazards and damage.