The severity of fatty liver needs to be judged based on the specific gravity of fat in the liver. Fatty liver can be categorized as mild fatty liver, moderate fatty liver and severe fatty liver. Fatty liver is usually detected through physical examination and imaging tests, such as ct, ultrasound, MRI, etc. Currently, the severity of the disease is judged based on the amount of liver fat. Liver fat at 5% to 10% is mild fatty liver, 10% to 25% is moderate fatty liver, and more than 25% is severe fatty liver. In addition, the more diagnostic means of fatty liver is liver biopsy, which can not only determine the content of fat cells in the liver, but also determine the nature of fat cells and whether there is degeneration and necrosis. If you are diagnosed with fatty liver, you should judge the severity of fatty liver under the guidance of a professional doctor and actively cooperate with the doctor for treatment to avoid adverse effects.