Many liver cancer patients are in advanced stage once they are found, which is usually related to the following factors: 1. Because of the special location of the liver, its location behind the rib cage is protected, and it is usually difficult to be touched; 2. The liver is special in that it is the only organ in the human body that does not have painful nerves. That is, no matter what kind of injury or exertion is suffered, there will be no abnormal pain. If it leads to the accumulation of liver disease and eventually endangers health Only after the liver cancer grows larger and squeezes the liver envelope or even involves extrahepatic organs, there will be slight discomfort, and most of them are mild and atypical symptoms, which do not easily attract patients’ attention; 3. The metabolic capacity of liver is relatively large, and the loss of 10%-20% of normal liver tissues, the human body cannot feel any discomfort at all. Therefore, middle-aged and elderly people over 40 years old, especially those with infectious diseases such as hepatitis B and C, as well as those with bad habits such as smoking and alcohol, should have regular medical checkups for early detection and early treatment.