The ideal total cholesterol level for a normal adult is 2.83mmol/L-5.20mmol/L. If the total cholesterol level is greater than 6.45mmol/L, it can be judged as hypercholesterolemia. Therefore, the total cholesterol of 9.2mmol/L is a high level and is considered hypercholesterolemia. Hypercholesterolemia is often caused by the patient eating fatty, sweet and heavy foods and eating too much high cholesterol food. In addition, liver lesions, such as cirrhosis and hepatitis, which cause damage to liver cells and abnormal liver function, can also cause an increase in total cholesterol levels. In mild cases of elevated total cholesterol, patients usually have no symptoms except for abnormal blood tests. However, in severe cases of elevated cholesterol, patients may experience changes in skin color, such as yellow patches in weak areas of the skin. Elevated total cholesterol can also lead to the formation of atherosclerosis, which can induce coronary heart disease, stroke and other diseases. If a patient finds that he or she has elevated total cholesterol during a checkup, he or she should go to the hospital promptly and have a doctor develop a reasonable treatment plan. Patients should usually reduce the consumption of foods with high cholesterol and control the intake of animal fats, such as using vegetable oil when cooking. You can consume more soy products, which are rich in vegetable protein as well as isoflavones, which can quickly break down excess cholesterol in the body to effectively prevent hypercholesterolemia.