Fatty liver, is a lesion caused by excessive accumulation of fat in liver cells due to various reasons. Fatty liver disease is seriously threatening the health of the nation, becoming the second most common liver disease after viral hepatitis, and has been recognized as a common cause of insidious cirrhosis. Fatty liver is a common clinical phenomenon rather than an independent disease. Its clinical manifestations are asymptomatic in mild cases and aggressive in severe cases. In general, fatty liver is a reversible disease, and early diagnosis and timely treatment can often restore normalcy. The incidence of fatty liver has increased rapidly in recent years in Europe, the United States and China, becoming the second most common liver disease after viral hepatitis. In some occupational groups (white-collar workers, cab drivers, professional managers, self-employed owners, government officials, senior intellectuals, etc.), the average incidence of fatty liver is 25%; in obese people and type II diabetics, the incidence of fatty liver is 50%; in alcoholics and alcoholics, the incidence of fatty liver is 58%; in sub-healthy people with frequent insomnia, fatigue, lack of food and drink, and gastrointestinal dysfunction The prevalence of fatty liver is about 60%. In recent years, the age of people with fatty liver has been decreasing, the average age is only 40 years old, and there are more and more patients around 30 years old. 45 years old and below are significantly more men than women with fatty liver.