The exact timing of cirrhosis from severe fatty liver usually depends on the patient’s physical condition and treatment. Usually, some patients suffer from severe fatty liver due to obesity and long-term consumption of foods high in fat and cholesterol, etc. Some patients also suffer from alcoholic fatty liver due to long-term alcohol abuse, and both of them can usually progress to cirrhosis, or even cirrhosis in the stage of decompensated cirrhosis. The exact time of cirrhosis caused by severe fatty liver is not clear, but it is important to note that not all patients with fatty liver will be transformed into cirrhosis. Generally for patients with mild fatty liver, they may improve within a few months through measures such as dietary regulation and improvement of lifestyle habits. For patients with severe fatty liver, they should first improve their lifestyle, control their diet and do relevant aerobic exercises, and then work with medication. If patients are diagnosed with severe fatty liver, it is recommended that they seek timely medical treatment to avoid delay.