Total cholesterol 5.53mmol/L is not necessarily hyperlipidemia, total cholesterol 5.53mmol/L belongs to the threshold value. Patients are considered to be hyperlipidemic if they have symptoms such as xanthomas and early onset corneal rings, but not hyperlipidemic if they have no uncomfortable symptoms. Patients with total cholesterol of 5.53mmol/hour are not necessarily hyperlipidemic. The reference value of total cholesterol ranges from 3 to 5.69mmol/L, and generally 5.17-6.45mmol/L is the critical value. The patient’s total cholesterol 5.53mmol/L belongs to the critical value range, if the patient has yellow tumor, early onset corneal ring, fundus changes and other symptoms, it may be caused by hyperlipidemia, if the patient does not have yellow tumor, early onset corneal ring and other uncomfortable symptoms, it is generally not hyperlipidemia. If the patient has a total cholesterol of 5.53mmol/L, it is not possible to diagnose hyperlipidemia. It is recommended that the patient consult a doctor in a timely manner and follow the doctor’s instructions for treatment.