Symptoms of diarrhea in patients with liver cancer can be caused by the occurrence of gastrointestinal metastasis, as well as non-cancer spreading factors such as intestinal infection and decreased digestive function. Liver cancer is a malignant tumor caused by hepatitis virus, alcohol, obesity and other factors. When the disease develops to the advanced stage, distant metastasis, such as gastrointestinal metastasis, can occur. At this time, clinical manifestations such as diarrhea, blood in feces, abdominal pain and abdominal mass can appear. In addition, it can also be caused by non-cancer spreading factors, such as intestinal infections due to unclean diet and decreased immune function; as well as gastrointestinal stagnation due to liver cirrhosis and portal hypertension of liver cancer patients themselves, which decreases the digestive function and ultimately leads to diarrhea. In conclusion, patients who stubbornly develop diarrhea should seek medical treatment in time for active treatment.