Fatty liver is likely to cause diabetes, which is a very common phenomenon, because fatty liver is an important part of the metabolic syndrome, and the condition of fatty liver patients is characterized by fatty lesions in the liver, in which case the glucose metabolism of the liver is disturbed, because the liver plays a very critical role in the whole process of glucose metabolism, and is the target organ of insulin. The process of glycogen synthesis and gluconeogenesis is mainly done in the liver, so the metabolic function of the liver in patients with fatty liver has been disrupted to a certain extent, in which case the process of glycogen synthesis and gluconeogenesis will be disrupted accordingly. If there is too much glycogen output, high fasting blood sugar will develop. Therefore, many patients with fatty liver often start to show high fasting glucose, which in this case will have a corresponding effect on the pancreatic islet cells, which will slowly cause the pancreatic islet cells to fail, leading to the occurrence of diabetes.