Total bilirubin is clinically an important basis for determining jaundice and an important indicator of liver function. The total bilirubin in serum is the sum of unconjugated bilirubin and conjugated bilirubin, and its normal concentration in serum is 1.7-17umol/L (0.1-1.0mg/dl), the normal concentration of unconjugated bilirubin is 0-13.68μmol/L (0-0.8mg/dl), and the normal concentration of conjugated bilirubin is 0-7.32μmol/L (0-0.2mg/dl). 0.8mg/dl), and the normal concentration of conjugated bilirubin is 0-7.32μmol/L (0-0.2mg/dl). If the serum bilirubin concentration exceeds the normal value, it indicates the possibility of hemolytic disease, liver lesions (such as viral hepatitis, drug-related hepatitis, alcoholic hepatitis and cirrhosis, etc.) or bile duct obstruction diseases (such as gallbladder stones, bile duct stones, cancer of the head of the pancreas, periampullary cancer, etc.), the level of serum bilirubin value represents the severity of jaundice. The normal values of bilirubin in infants are slightly different from those in adults, and the normal range of bilirubin in infants is 3.4-17.1 μmol/L for total bilirubin, 0-6.8 μmol/L for direct bilirubin, and 1.7-10.2 μmol/L for indirect bilirubin. μmol/L. Generally, jaundice gradually subsides in 2-3 weeks. Once the bilirubin is found to be elevated, you should immediately go to a regular hospital for further examination and develop a medication plan according to the specific situation to avoid delaying the condition.