The liver is called the “chemical factory” of the human body, and many substances are synthesized, broken down and transferred in the liver, and fat is no exception. In a normal person with a good diet, the fat content of the liver is about 3-5% of the weight of the liver, but in some abnormalities the amount of fat in the liver increases significantly. When the fat content of the liver exceeds 10% of the weight of the liver, it is called fatty liver. Long-term fatty liver, if uncontrolled, can lead to liver function damage and even cirrhosis. Like the occurrence of hyperlipidemia, the age of fatty liver has become younger in recent years because of the office environment, mainly engaged in mental work, coupled with more calorie intake and more opportunities to “push and exchange” in social occasions. 1.Clinical manifestations There are many causes of fatty liver, which may be a combination of factors. However, in recent years, fatty liver is mostly associated with improper diet, such as excessive fat, cholesterol or sweet food intake and long-term alcohol consumption. Other causes include post-hepatitis and diabetes mellitus. The clinical manifestations of fatty liver vary very widely from person to person. Common discomforts include pain in the liver area, weakness, abdominal distension, irregular stools, and loss of appetite. In addition, it is clinically observed that fatty liver often coexists with high serum triglycerides and increased transaminases. 2.Diagnosis and differentiation Patients with fatty liver are often accompanied by obesity, elevated blood lipids (especially elevated triglycerides), and abnormal liver function (mild to moderate increase in transaminases). An ultrasound examination of the liver is sufficient to make a determination. Fatty liver should be distinguished from other liver disorders, such as infectious hepatitis, post-hepatitis hepatic steatosis, liver cancer, biliary tract disorders, gastric ulcer and pancreatic diseases. 3.Treatment principles Since the causes of fatty liver and hyperlipidemia have something in common, we can refer to the content of hyperlipidemia for its prevention. Treatment of fatty liver should pay attention to the following points: ① First of all, we should remove the cause of the disease, such as treating the primary disease, stop taking certain drugs that cause liver damage, etc. ②Adjust the diet structure, eat a high-protein, high-vitamin, low-fat diet, eat less sweets, and restrict calories in obese people (can be calculated by referring to the method of hyperlipidemia treatment) or increase the amount of exercise and reduce body weight. Drink alcohol in moderation, generally do not drink more than 1 tael per time, and not more than 5 taels per week, the liver can still compensate, of course, it is best to drink less or not to drink. ③Take lipid-lowering drugs, such as liver damage and transaminase increase can take liver-protective drugs, and take multivitamins. Of course, medication needs to be taken under the guidance of a physician, the recent social popularity of the so-called “liposuction surgery” and “bowel cleansing therapy” because it is easy to cause infection and lead to the normal metabolic disorders in the body, so it is not recommended to easily try.