The three blood lipids generally refer to total cholesterol, triglycerides and LDL cholesterol. 1. Total cholesterol: Its normal value is generally 2.8-6.5mmol/L. Elevated total cholesterol is commonly found in bile duct obstruction, nephrotic syndrome, atherosclerosis, etc. Long-term consumption of high-fat food will also elevate total cholesterol. Decrease in total cholesterol is common in severe anemia, acute infection, malnutrition. 2. Triglycerides: the normal value of children <1.13mmoL/L, adults in the 0.56 ~ 1.70mmol / L between. Elevated values are common in hyperlipidemia, atherosclerosis, coronary heart disease, diabetes mellitus, nephrotic syndrome and other diseases, while lower values are seen in hyperthyroidism, hypoadrenocorticism, chronic obstructive pulmonary disease and so on. 3. LDL cholesterol: the normal value is generally 1.0 ~ 4.4mmol / L, LDL cholesterol is a risk factor for atherosclerosis, increased often suggests that the risk of coronary heart disease, cerebrovascular disease increased. It is recommended that patients with abnormal test results should make timely adjustments under the guidance of their doctors, actively control their diets, and engage in physical exercise to prevent the occurrence of diseases.