A low density of 4.35 is considered high. Low density is fully known as LDL, which is converted from very low density lipoproteins, which are cholesterol-rich lipoproteins. Normally, its normal value is below 3.4mmol/L. However, when there are some diseases such as diabetes, hypertension, etc., the patient belongs to the high-risk group of cardiovascular and cerebrovascular diseases, at this time the LDL cholesterol level should be controlled even lower, and the range of the normal value should be reduced to 2.6mmol/L or less. When the risk factors increase further, such as myocardial infarction with diabetes mellitus or cerebral infarction with diabetes mellitus, the patient belongs to the very high-risk group of cardiovascular and cerebrovascular diseases, and the control of LDL cholesterol level needs to be even lower, and it should be controlled to below 1.8mmol/L. The patient is recommended to consult a regular hospital in time. It is recommended that the patient go to the regular hospital in time, and standardize the treatment under the guidance of the doctor, so as not to delay the condition.