High serum LDL, which means that the value of serum LDL is higher than normal during the blood lipid test, suggests the presence of hyperlipidemia. Lipid tests mainly include HDL cholesterol, LDL cholesterol, triglycerides and total cholesterol, etc. Among them, LDL cholesterol is also known as “bad cholesterol”, and an increase in its value suggests the presence of hyperlipidemia. Hyperlipidemia is an important risk factor for atherosclerosis, coronary heart disease, cerebral infarction, and other thrombotic diseases. This group of people should try to maintain a low-salt, low-fat diet and take more vitamin-rich vegetables and fruits. If high LDL value persists, it is necessary to take some lipid-lowering drugs under the guidance of a doctor.