Indirect bilirubin of 15 μmol/L suggests that it is within the normal range, so it is not serious. Indirect bilirubin is formed after the destruction of red blood cells. It is an important indicator of liver function, so when it is low or high, it indicates a liver lesion. If for some reason a large number of red blood cells are destroyed, the production of indirect bilirubin will increase, and when the liver is unable to fully convert it into direct bilirubin, the level of indirect bilirubin in the blood can be significantly increased. If the liver’s ability to synthesize and convert bilirubin is blocked, indirect bilirubin cannot be converted in a normal and timely manner, which can also result in high indirect bilirubin. Low indirect bilirubin does not have much clinical significance, but increased indirect bilirubin has more clinical significance and is often seen in hemolytic jaundice, hepatocellular jaundice, cholestatic jaundice, and other diseases. Therefore, if the indirect bilirubin is low, there is no special treatment, and continue to observe its dynamic changes. If the indirect bilirubin is elevated, it is necessary to go to the hospital in time, improve the examination to clarify the cause of the disease, and then treat it under the guidance of the doctor as soon as possible.