Albumin in the human body is mainly synthesized by the liver, and its normal value varies with the reference standard depending on the age stage. For children and newborns, the normal value is between 28-44g/L; for adults, the normal value is generally between 35-50g/L; for the elderly, the normal value is generally between 34-48g/L. For normal people, the albumin in the body is usually mostly at normal. Because of food intake and liver synthesis, the albumin in the body is stable. However, for some patients with combined liver diseases, especially for patients with viral hepatitis or cirrhosis. As the amount of albumin synthesis in the body decreases due to excess, the albumin in the body will be further reduced after the liver forms further deterioration of liver function. If the albumin is too low, it can cause edema and fluid in the peritoneal cavity, as well as fluid in the chest cavity. In these cases, the patient needs to have a blood test for liver function. If this indicates a low albumin level, an aggressive intravenous infusion of albumin will be required for albumin supplementation if necessary. Etiologic treatment is also needed to address the cause of the disease and, in the case of patients with viral hepatitis, antiviral therapy is also required at some point.