Fatty liver and blood sugar belong to the same category of metabolic diseases. Fatty liver and blood sugar can affect each other, leading to abnormalities in lipid metabolism and glucose metabolism, thus aggravating the occurrence and progress of fatty liver and diabetes. 1. If blood sugar is too high, stored in the liver as glycogen, which exceeds the conversion ability of the liver, it can lead to lipid metabolism disorder and fat deposition, thus aggravating the occurrence and progress of fatty liver. 2. If persistent fatty liver affects the liver’s conversion of hepatic glycogen, leading to elevated blood glucose in the blood, it can lead to disorders of glucose metabolism, thus aggravating the occurrence and progression of diabetes mellitus. In case of fatty liver and high blood glucose, it is recommended to go to the hospital for consultation and treatment under the guidance of professional physicians.