The normal value of indirect bilirubin ranges from 3.4 to 17, and a value of 21 indicates that indirect bilirubin is elevated, but the elevation is not large, and it needs to be combined with other clinical tests to determine whether there is liver damage. Patients with elevated indirect bilirubin may have liver disease, hemolytic jaundice, hepatocellular jaundice and other diseases, all of which can lead to elevated indirect bilirubin, so clinical tests such as biochemistry and ultrasound of the liver are needed to determine whether there is any damage to the liver. For patients with elevated indirect bilirubin, it is recommended that during this period, they should eat a light diet, do moderate exercise, get enough sleep, and go to the hospital regularly to review their liver function, as a single elevated indirect bilirubin does not indicate that there is damage to the liver.