LDL of more than 4 mmol per liter is an abnormal high value, and dietary control or medication is recommended for timely treatment. LDL is a kind of blood cholesterol, its value is elevated and atherosclerosis is very close relationship, is an independent risk factor, normal blood LDL normal value is less than 3.4 mmol / L, the measured value of more than 4 mmol per liter, suggesting that the high value of LDL abnormal. When LDL is elevated, it is recommended to adjust the dietary structure in time, reduce the intake of high-fat food, prohibit the consumption of alcohol, and if necessary, follow the doctor’s instructions to take oral medication for treatment, commonly used drugs are simvastatin, atorvastatin, resuvastatin and so on. Long-term oral lipid-lowering drugs may cause liver function abnormalities, rhabdomyolysis and other symptoms, and it is recommended to review liver function regularly and consult a doctor if there is any abnormality.