The symptoms of high cholesterol, first of all, most mild and moderate cholesterol elevations have almost no symptoms. But for some cases like hereditary, familial hyperlipidemia, such as hypertriglyceridemia and hypercholesterolemia, sometimes there are some signs and symptoms, and there may be yellowish sclera, or even more lipomas and other such cases. Generally, it has no symptoms, unless it develops to a certain degree, atherosclerosis, arterial stenosis, and local ischemic symptoms, which are quite harmful. If cholesterol continues to increase, that is, hypercholesterolemia, it is easy to lead to atherosclerosis of the blood vessels, resulting in damage to the walls of the blood vessels, easy to form the narrowing of the blood vessels, once the narrowing of the blood vessels is aggravated, it may cause local ischemia, such as myocardial ischemia, cerebral ischemia, and the condition continues to worsen is likely to appear myocardial infarction, cerebral infarction, etc., the danger is quite great.