Liver cancer includes both primary and secondary liver cancer, usually referred to as primary liver cancer, which has poor clinical treatment effect and is called the “king of cancers”. Early detection is an effective means to improve the curative effect, but early detection needs to be done from many aspects. 1. Understand the causes of liver cancer, understand the high-risk factors of liver cancer, and have regular medical checkups. Various types of viral hepatitis, especially hepatitis B and C, are most likely to bring liver cancer; cirrhosis caused by various reasons, such as toxic exposure, schistosomiasis, liver and bile duct stones and inflammation, alcoholism; eating moldy food and food made of gutter oil are the most important factors to bring liver cancer. If these factors are already present, you should pay more attention to liver protection and have regular imaging examinations of liver and biliary system, liver function and fetoprotein, etc. 2.If you already have the above high-risk factors, then you need to have a complete understanding of the early manifestations of liver cancer. There are often no obvious symptoms in the early stage of liver cancer, and often patients and family members say that he can eat and sleep, how come such a big liver mass is found in the first examination? Catching the clues may have completely different consequences. Early stage of hepatocellular carcinoma generally has the following symptoms: (1) vague pain and discomfort in right upper abdomen, distension is common, which is generally related to tumor growth and tension of liver envelope. (2) Loss of appetite, indigestion, and sometimes nausea and vomiting, which are all symptoms of liver insufficiency. (3) Bleeding from nose, gums and subcutis is aggravated in patients who have been having cirrhosis in the past. (4) Weakness, emaciation, poor sleep itching and edema of the skin. (5) Yellowing of the skin or eyes, deep yellow urine, or even redness, all suggest problems with the liver’s metabolism of bilirubin. (6) Unexplained fever may be related to tumor growth and necrosis. Once you have the above symptoms, you should come to the hospital for medical consultation in time. 3. The severity of liver cancer symptoms is mostly related to its impact on liver function, and the liver function of liver cancer patients often determines the treatment and prognosis they can bear. Therefore, scientific, rational and keen observation of liver function of high-risk people often determines the early detection and treatment of liver cancer.