Diagnosis of fatty liver can be determined by clinical manifestations, imaging tests, laboratory tests and pathogenetic tests. 1. Clinical manifestations: patients may have loss of appetite, abdominal pain, pain in the liver area, etc. They may also have overweight, nausea and vomiting. 2. Imaging examination: ultrasound can be used to determine whether the liver is enlarged and whether the echo is abnormal, which is one of the common methods to check fatty liver. It is one of the common methods to check fatty liver. Abdominal CT can also be used to determine whether there is fatty liver. 3. Laboratory tests: liver function often indicates elevated aminotransferases, the presence of significant hyperlipidemia, often triglyceride and cholesterol elevation is obvious, while excluding other liver diseases. 4. Pathogenetic examination: the diagnosis can be confirmed by liver puncture. Patients with fatty liver should have a light diet in daily life, avoiding spicy and stimulating, greasy food, such as fatty meat, barbecue and other foods, so as not to aggravate the development of the disease.