High HDL cholesterol is generally good for transferring cholesterol to the liver for metabolism, but high HDL cholesterol can also be caused by some liver diseases, a condition that is harmful.
Accumulation of cholesterol in blood vessels can lead to atherosclerosis, causing narrowing or occlusion of blood vessels, causing cardiovascular and cerebrovascular diseases such as coronary heart disease and cerebral infarction. The main function of HDL cholesterol is to transport cholesterol from the blood vessels to the liver for metabolism and to lower the blood cholesterol level.
High HDL cholesterol may be seen in some liver diseases, such as chronic hepatitis, drug-induced liver injury, cirrhosis, etc. This condition will have the danger of liver disease itself.
Mildly high HDL cholesterol is generally not harmful, although a hospital visit is recommended to further identify the cause.