Lipid refers to the general term for cholesterol and lipids in the blood. Usually, the blood lipid test includes triglycerides, total cholesterol, LDL cholesterol, HDL cholesterol, lipoprotein A, lipoprotein B, and other components. It is mainly to determine whether the blood lipids are normal or not, and generally it is to see whether there is hyperlipidemia. Hyperlipidemia is mainly divided into the following conditions: first, hypertriglyceridemia, which means that the triglyceride level exceeds 1.7 mmol/L. Second, hypercholesterolemia, which means that the total cholesterol exceeds 5.98 mmol/L, is called hypercholesterolemia. Of course, some patients may have mixed hyperlipidemia, that is, hypertriglyceridemia combined with hypercholesterolemia.