HDL cholesterol 2.01mmol/L belongs to high, if it is caused by improper diet then it is generally not serious, if it is caused by chronic hepatitis, cirrhosis and other diseases, then it is a serious situation. 1. Improper diet: when patients have high HDL cholesterol, they may have eaten a lot of greasy food, such as fatty meat, fried chicken, lard and so on, before the blood test, which will lead to high HDL cholesterol in the test results of the patients. 2. Chronic hepatitis: Chronic hepatitis is mainly caused by hepatitis virus infection and other factors, which can also lead to the phenomenon of high HDL cholesterol. There is no obvious symptom in the early stage, some patients may have symptoms such as easy fatigue, stomach upset, etc. High HDL cholesterol caused by chronic hepatitis is a serious situation. 3. Cirrhosis: Cirrhosis is mainly caused by chronic liver disease, which will lead to high HDL cholesterol. The main symptoms of cirrhosis are fatigue, loss of appetite, abdominal pain and so on, which is a serious situation. Patients with high HDL cholesterol should seek timely medical treatment and follow the doctor’s instructions.