Direct bilirubin of 7.8 is a mild increase in bilirubin, which is not important if it is accidental and may be due to physiological factors such as excessive alcohol consumption or fatigue, but if it is persistent, it may be secondary to other important conditions, such as liver injury, obstruction of the extrahepatic bile ducts, and short-term destruction of a large number of red blood cells, etc. The normal value of direct bilirubin is below 6.8 umol/L, while 7.8 is a mild increase in bilirubin. The normal value of direct bilirubin is below 6.8 umol/L, while 7.8 belongs to the mildly increased situation, and the causes of the abnormal increase of direct bilirubin are more complicated, firstly, it can appear in some irregularities of life or dietary habits, such as excessive consumption of alcohol or fatigue, etc., which can be relieved by timely adjustment. In pathological conditions such as liver injury, obstruction of the extrahepatic bile ducts and short-term destruction of a large number of erythrocytes, direct bilirubin test values can also be abnormally high, and the speed and value of the increase will be higher, possibly up to dozens of accompanied by the corresponding signs and symptoms, which need to be vigilant. It is recommended that when the direct bilirubin increases rapidly in a short period of time or exceeds the normal value for a long period of time, it is necessary to consult a doctor in a timely manner to clarify the cause of the disease and to take timely corresponding treatment.