A low-density lipoprotein (LDL) of 5.5 mmol/L is considered hyper LDLemia and requires treatment, which includes general treatment such as dietary control, medication such as lovastatin as prescribed by the doctor, and surgery. Low-density lipoprotein LDL is a cholesterol-rich lipoprotein and is one of the risk factors for atherosclerosis. Normal LDL is ≤3.4mmol/L, at 3.4~4.1mmol/L is called borderline level, and more than 4.1mmol/L is elevated. 1.General treatment (1) Dietary control: on the basis of ensuring daily nutrition and energy, limit the intake of saturated fatty acids and supplement soluble dietary fiber. (2) Increase exercise: Adhere to regular moderate-intensity exercise every day and pay attention to maintaining a suitable body weight. (3) Others: Abstain from smoking and alcohol, and avoid the intake of food with high salt content such as pickled food. 2. Drug therapy: statins such as lovastatin, simvastatin, fluvastatin, atorvastatin, etc., bile acid sequestrants such as colestipol and colestipol, etc. can be used. These drugs need to be used under the guidance of clinicians, and unauthorized use of drugs is absolutely prohibited. 3. Surgery: For patients with severe obesity, weight loss surgery may be chosen according to the patient’s specific situation. Hyperlipidemia, such as high and low density lipoproteinemia, requires timely access to hospitals to avoid delaying the condition.