The causes of total bile acid as high as 30 μmol/L are considered to be related to physiological factors, bile duct diseases, liver diseases and other factors. 1. Physiological factors: some patients may have symptoms of high total bile acids during examination due to overwork, strenuous exercise, heavy drinking, etc. These symptoms are not clinically significant and can be relieved by rest, diet control and change of lifestyle. 2. Bile duct diseases: If the patient has cholangitis, choledocholithiasis, cholestasis, etc., the excretion of bile acids may be obstructed, which will gather in the bile ducts and enter into the bloodstream through the blood vessels of the bile ducts, resulting in the elevation of the total bile acids to 30 μmol/L. 3. Liver diseases: If the patient has liver diseases such as hepatitis, cirrhosis, fatty liver, liver cancer, etc., the liver function may be reduced, and when bile acids enter the hepatic circulation, it will lead to a decrease in the ability to remove bile acids, and then there will be symptoms of high total bile acid level. It is recommended that the patient can go to the hepatobiliary surgery department of the hospital for consultation, and then have the relevant diagnosis made by a specialized doctor to determine the cause before handling and treating the problem.