Whether a higher direct bilirubin is normal depends on exactly how much higher. The normal reference value of direct bilirubin is 0-6.8μmol/L. If the increase is only about 1μmol/L, it has no clinical significance, but if it is significantly higher than the normal value, or even develops in multiples, it is not normal and needs to be checked and treated in a hospital. Strenuous exercise, overexertion, alcoholism and other reasons can lead to a mild increase in direct bilirubin, which can generally recover on its own by improving lifestyle and is a more normal situation. Some of the reasons for high direct bilirubin are due to congenital lack of certain enzymes, which affects the metabolism of bilirubin, indicating damage to liver cells or biliary tract problems. In cases where both direct and indirect bilirubin are high, there is often concurrent liver cell damage, which may be hepatocellular jaundice, which is more serious and should be actively investigated at a hospital to find the cause. For patients with high direct bilirubin, it is recommended that they must develop good habits, have regular checkups in their lives and do preventive work.