The normal range of total bilirubin is 3.4-17.1 μmol/L, with 28 μmol/L being mildly elevated. Elevated total bilirubin can be due to physiologic and pathologic causes. Physiological causes include physiological jaundice in newborns, alcohol consumption, and exertion, etc. Pathological causes include hepatitis, cirrhosis, gallstones, and pancreatic head cancer. Elevated total bilirubin needs to be judged in combination with liver function, pathogenetic examination, blood lipids, blood routine, liver and gallbladder ultrasound, abdominal CT and other examinations, especially in patients with jaundice, abdominal distension, loss of appetite, fever and other uncomfortable symptoms. When the total bilirubin is 28μmol/L, it is recommended to consult a doctor in time to clarify the cause of the disease under the guidance of a specialized physician.