Triglyceride 5.5mmol/L, if lifestyle intervention is ineffective, or with risk factors such as hypertension, coronary heart disease, stroke, etc., it is recommended to actively take medication to control blood lipids. The normal reference value of triglyceride is less than 1.7mmol/L, and it is elevated when it is greater than 2.3mmol/L. Triglyceride 5.5mmol/L is more serious, and long-term high triglyceride level can increase the risk of atherosclerotic diseases, such as coronary heart disease and cerebral infarction. Lifestyle intervention is the first step in this case, including dietary avoidance of fatty and high-salt foods, cessation of smoking and alcohol consumption, and maintenance of appropriate frequency and intensity of physical activity. If the effect of lifestyle intervention is not satisfactory, or if there are risk factors such as coronary heart disease, high blood pressure and stroke, it is recommended to take medication for further lipid lowering. You can take beta drugs such as fenofibrate, niacin and other drugs under the guidance of your doctor. If necessary, please consult a doctor in time to standardize the diagnosis and treatment.