Symptoms of fatty liver are related to the severity of the patient’s condition. Mild patients usually have no obvious symptoms, moderate patients may have atypical symptoms such as abdominal distension and poor appetite (poor appetite), and severe patients may show jaundice and ascites. Fatty liver, also known as steatohepatitis, is a disease caused by the accumulation of large amounts of fat in liver cells, resulting in diffuse steatosis of liver cells, which can affect the normal function of liver cells. Depending on the degree of fat accumulation in liver cells, it can be categorized into mild, moderate and severe fatty liver, with symptoms varying from one period to another. Mild fatty liver is defined as having 5% to 32% steatosis of liver cells, which has less impact on the function of patients’ liver cells, and patients usually do not have obvious clinical symptoms, and most of them are found during physical examination. Moderate fatty liver refers to 33%～65% of hepatocyte steatosis, which will have some impact on the liver function of patients. At this time, it is mainly manifested by digestive symptoms, such as abdominal distension, loss of appetite, nausea and vomiting, constipation, and fatigue. Severe fatty liver refers to more than 66% of liver cells with steatosis, at this time, the liver function of the patient is seriously affected, and jaundice, ascites, lower limb edema, epigastric pain, liver palms, spider nevus, portal hypertension, gastrointestinal bleeding and other symptoms may appear. Patients with fatty liver are recommended to seek medical treatment in time and receive treatment actively to avoid delaying their condition.