Total cholesterol of 6.59mmol/L exceeds the normal range and is generally more serious. However, due to the different examination methods and reagents, and the different reference indexes in each hospital, specific analysis is still needed. Under normal circumstances, the normal value of serum total cholesterol <5.20mmol/L, borderline elevated 5.23-5.69mmol/L, elevated >5.72mmol/L. Elevated total cholesterol can be caused by dietary factors, but it can also be caused by diseases such as liver and kidney disease and glycogen storage disease. Long-term elevated total cholesterol and accumulation of lipid deposits in the blood can lead to atherosclerosis, loss of mental and physical strength, and xanthomas. Patients found to have elevated total cholesterol should control their body weight to achieve an appropriate body mass index. Reasonable diet, control total calories and reduce fat. Appropriately increase exercise to consume excess fat, but physical activities should be gradual and should not be forced to do strenuous activities. It is recommended that patients with elevated total cholesterol go to the hospital in a timely manner and follow the doctor’s instructions for treatment to avoid delays.