An unstable plaque is a type of plaque that forms during atherosclerosis that is softer in texture, prone to rupture, and prone to intra-plaque hemorrhage. Plaque is usually caused by high blood lipids, high blood viscosity, etc., which leads to abnormal deposition of lipids, blood cells, and other blood vessel walls, stimulating the proliferation of surrounding tissues, and the formation of inwardly projecting accumulations in the blood vessel walls that contain lipids, neoplastic capillaries, blood clots, and connective tissues. If the plaque calcification, and the surface of the formation of complete fibrous connective tissue, or the surface of the formation of complete vascular endothelial cells, usually the plaque nature is stable, not easy to rupture, called stable plaque. In the early stage of plaque formation, lipid exposure, fibrous connective tissue and vascular endothelial tissue is incomplete, the plaque is unstable and easy to rupture, called unstable plaque. Unstable plaque is easy to fall off, rupture, triggering thrombosis or bleeding, is a more dangerous state, part of the case, stable plaque in the blood impact, the outer membrane rupture, will also form unstable plaque. It is recommended to go to the hospital in time and stabilize the plaque by lowering fat and blood pressure under the guidance of the doctor, and at the same time eat a low-salt and low-fat diet.