Reduced albumin can be seen in hepatology, nephrology and general internal medicine. Albumin is synthesized in the liver, and the liver is the only organ that synthesizes albumin. If there is a decrease in albumin, you should consider whether there is a decrease in albumin synthesis caused by abnormal liver function, so you should go to the hepatology department to fully exclude any liver disease. In addition, the decrease in albumin may also be due to excessive albumin excretion and leakage from the urine, which is common in nephrotic syndrome, etc. Therefore, if there is a large amount of protein in the urine, accompanied by a decrease in serum albumin, you should go to the nephrology department for further consultation. If liver disease and nephropathy are both ruled out after the above screening, it is recommended to visit the comprehensive internal medicine department to rule out any chronic wasting due to tumors or other chronic diseases.