Primary liver cancer, or hepatocellular carcinoma, is one of the frequent malignant tumors. Its symptoms are usually obvious, especially in the early stage of the disease process. About 70% of small hepatocellular carcinomas, usually below cm, are asymptomatic. Once symptoms appear, it means that the tumor is already large and its disease develops rapidly, usually showing malignant quality within weeks, and patients often die of exhaustion within a few months to a year. Therefore, it is necessary to understand the early symptoms of liver cancer. Irregular fever after liver cancer, the patient’s resistance will be reduced and co-infection will occur, which is manifested as fever, but the temperature change is not regular and there is no chill, which often occurs in the afternoon. Early symptoms of digestive tract dysfunction liver cancer can be manifested in the digestive tract as loss of appetite, epigastric fullness after meals, nausea, vomiting or diarrhea, which can be easily misdiagnosed as enteritis, thus misleading the disease Hypoglycemia The liver itself has a strong compensatory capacity, and only when the area of liver damage exceeds 70% to 80% will obvious symptoms of hypoglycemia appear, manifesting as dizziness, weakness and sweating. Mass in upper abdomen If a mass can be easily touched in the right upper abdomen and upper abdomen of adults over 30 years old, and it has hard texture, uneven and unsmooth surface, poor mobility, and the tendency of enlargement is obvious after continuous observation for a period of time, but there is no obvious self-conscious manifestation and discomfort, then a comprehensive examination should be done and it is likely to be liver cancer. In the early stage of liver cancer, there will be bleeding tendency such as gum bleeding and subcutaneous petechiae, and in the middle and late stage, there will be gastrointestinal bleeding, which is mainly caused by the rupture of esophagogastric fundic varices due to portal hypertension. In clinical practice, gastrointestinal bleeding can easily lead to death if not rescued in time. Patients with hyperlipidemia cirrhosis and chronic hepatitis may also present hyperlipidemia as a sign of liver cancer if they have excluded high-fat diet, heavy alcohol consumption, lack of exercise and certain endocrine diseases. The clinical manifestations and signs of hyperlipidemia, such as obesity and atherosclerosis, are manifested. Erythrocytosis Patients with long-term cirrhosis or chronic liver disease presenting with increased red blood cells for no other reason may be an early sign of hepatocellular carcinoma and should be given great attention. This is because when cancer cells in the liver divide, they produce a lot of erythropoietin, resulting in excessive red blood cell production. However, the increase of red blood cells in liver cancer patients is not accompanied by the increase of white blood cells, platelets and lymphocytes. Thus, the higher the number of red blood cells, the more vigorous the cell division of liver cancer. Clinical manifestations include red face and polycythemia vera.