Abdominal bloating may be caused by cancer, such as liver cancer, stomach cancer, pancreatic cancer, etc., but it can also be caused by many other factors, and it does not necessarily indicate the presence of cancer. Liver cancer, stomach cancer, pancreatic cancer and other cancers lack typical clinical manifestations in early stage, and there may be gastrointestinal symptoms such as abdominal distension, abdominal pain, indigestion, jaundice, emaciation, nausea, etc. Relying on the symptoms alone, it is difficult to differentiate them from other digestive diseases. It is suggested that patients should seek timely and complete the relevant examinations, such as tumor markers, barium meal X-ray, ultrasonography, etc., to make it clear whether there is cancer or not. Besides cancer, abdominal bloating can be caused by physical factors such as mental stress and over-eating, which can be relieved after resting. If it is accompanied by other gastrointestinal symptoms, it may be caused by gastritis, gastric dilatation, functional dyspepsia, irritable bowel syndrome, cirrhosis of the liver, cholelithiasis, pancreatic cysts, and other diseases. Patients with symptoms of abdominal bloating, persistent unrelieved or accompanied by other discomforts, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor to determine the cause of the disease, not blindly judge by themselves, so as to avoid delays in the condition.