The exact time it takes for fatty liver to cause cirrhosis depends on the individual’s physical condition and treatment; some patients may cause cirrhosis in 1 to 2 years, while others may take 3 to 5 years or even longer. The transformation of fatty liver into cirrhosis is also a long process. Fatty liver is caused by the accumulation of too much fat in liver cells, and the treatment should be to quit smoking and drinking, low-fat diet, appropriate exercise, and if necessary, follow the doctor’s instructions to use liver-protecting drugs such as silymarin and lipid-lowering drugs such as fenofibrate. For early fatty liver, if standardized treatment, liver cells can be restored to normal, and in such cases, fatty liver may not develop into cirrhosis in the whole life. However, for patients with severe fatty liver without standardized treatment, it may even develop into cirrhosis within one to two years, and some patients with fatty liver may gradually progress to cirrhosis in the next ten to several decades. Patients diagnosed with fatty liver should actively cooperate with doctors for treatment and maintain a healthy lifestyle and diet, which can help improve the prognosis.