Atherosclerosis mainly occurs in the large arteries in the body, for example, the most common are coronary arteries, carotid arteries, cerebral arteries, renal arteries. At this time, lipid accumulation, fibrous tissue growth, and calcium deposition occur inside the blood vessels, forming atherosclerotic plaques. This is the most common form of cardiovascular disease, usually involving the large arteries and the large circulation. This condition may be asymptomatic in the early stages, but in severe cases there will be dizziness, headache and chest tightness.