If the patient is currently experiencing low LDL, do not be nervous first, but ask if the patient is currently taking statins to lower lipids and stabilize plaque, representative drugs include atorvastatin, resulvastatin, pitavastatin, etc. In the process of taking such drugs, patients may have LDL below the lower limit of normal, but this situation may be due to the presence of coronary angina or a previous myocardial infarction, requiring patients to control LDL below the lower limit of normal to qualify, which is of little significance. Some people with low LDL may be in a cachectic state, such as chronic malnutrition, or people with advanced tumors who eat particularly poorly, and may have low LDL. Some people may also have low LDL due to hyperthyroidism.