Mild fatty liver usually does not cause long-term elevation of bilirubin 3. Moderate and severe fatty liver may cause long-term elevation if not treated in time. Fatty liver refers to a kind of disease that causes abnormal liver function due to the accumulation of large amount of fat in the liver. When 5%~32% of liver cells show steatosis, it suggests mild fatty liver, which has less effect on liver function and usually does not cause long-term elevation of bilirubin three items, i.e. direct bilirubin, indirect bilirubin and total bilirubin. When 33% to 65% of liver cells have steatosis, it is moderate fatty liver, and when more than 66% of liver cells have steatosis, it is severe fatty liver, at this time, it has a greater impact on liver function, and may cause direct elevation of the three bilirubin items if it is not treated in time. Patients with fatty liver are recommended to consult doctor in time and accept treatment actively, usually after professional doctor’s treatment, liver function indexes will gradually return to normal, and bilirubin triple can be restored gradually.