The normal value of total bilirubin is 3.42-20umol/L. If there is an elevated total bilirubin, it indicates hepatobiliary disorders. Therefore, we should do further examination according to the situation to see if there is hepatitis, fatty liver, autoimmune liver disease, drug-related liver injury, alcoholic liver disease, etc. We can further determine the cause according to the ultrasound situation, or we can determine the cause according to its medical history, and then use medication according to the cause. If the total bilirubin alone is elevated, we need to look at whether it is mainly direct bilirubin or indirect bilirubin, and if it is hepatocellular, both may be elevated. If the direct bilirubin is significantly elevated, it may indicate primary biliary cirrhosis, biliary obstruction and other diseases. If the indirect bilirubin is significantly elevated, it often indicates hemolytic disease, so the diagnosis should be made based on specific indicators, medical history and medical condition.