Diffuse intrahepatic lesions are detected only when liver imaging is performed, indicating that the entire liver lesion has developed more pronounced histopathological changes. The most common clinical cause of such changes is hepatic fibrosis. Liver fibrosis is not a specific disease, but rather an abnormal histopathological manifestation of the liver, caused by the necrosis of injured liver cells that are removed by the body and the defective areas are filled with proliferating fibrous tissue. There are many clinical causes of liver fibrosis, the main ones include viral infection, alcohol consumption, intrahepatic fat deposition, intrahepatic cholestasis, stasis liver disease, and metabolic abnormalities. However, liver fibrosis can be cured, and when the fibrosis is reversed, the diffuse liver changes will also be reduced or disappear. However, if cirrhosis appears, the diffuse changes in the liver will not disappear at this time, and there may even be more serious nodular lesions.