Liver surface less smooth is mostly an imaging manifestation. It may be caused by various reasons such as liver diseases, trauma, hepatic schistosomiasis and so on. 1. Liver diseases: common liver diseases such as hepatitis, cirrhosis, hepatocellular carcinoma, etc., can cause degeneration and necrosis of liver cells, and the continuous progress will lead to fibrosis or pseudo lobe formation in the liver, resulting in the surface of the liver is not smooth. 2. Trauma: trauma leads to rupture of the liver, and after gradual healing, the surface of the liver can be scarred, resulting in a lack of smooth surface. 3. Hepatic schistosomiasis: after the eggs of schistosomes are phagocytosed by macrophages in the liver, they will evolve into fibroblasts and form fibrous nodules, which will lead to the uneven surface of the liver and not smooth. The appearance of liver surface is not smooth, it is recommended to improve the examination, clarify the cause and standardize the treatment.