Total cholesterol of 8.4mmol/L is usually in need of treatment. The normal value of total cholesterol should be <5.2mmol/L. Total cholesterol 8.4mmol/L, which is out of the normal range, usually requires treatment under medical supervision. Total cholesterol 8.4mmol / L usually consider the existence of hyperlipidemia, hyperlipidemia refers to the plasma cholesterol and triglyceride levels increase caused by the disease, first of all through the diet and exercise for treatment, diet should be a low cholesterol diet, pay attention to light, adhere to the moderate exercise every day, but also can be taken orally on-demand statin lipid-lowering drugs, such as etoposide, reserpine vastatin and so on. If the total cholesterol is found to be high, it is recommended to consult a doctor in time and have regular treatment under the guidance of a professional physician.