Swelling in the right upper abdomen in early stage of liver cancer is usually related to dyspepsia, ascites, portal hypertension and other factors. 1. Functional dyspepsia: gastrointestinal function will be weakened in patients with liver cancer, which will easily cause gastric distension, gastrointestinal discomfort and other symptoms after eating, and in serious cases, it can affect appetite and lead to loss of appetite. 2. Hepatic ascites: cirrhosis and hepatic ascites may appear in the early stage of liver cancer, which is related to the damage of liver function, and the amount of ascites gradually increases, leading to abdominal distension after the pressure in the abdominal cavity increases. 3. Portal hypertension: after the formation of portal hypertension, the increase of hydrostatic pressure of abdominal visceral vessels will affect the absorption of tissue fluid, thus causing abdominal distension. Early stage liver cancer patients’ epigastric distension may also be caused by factors such as improper diet and little exercise, etc. It is recommended to go to hospital as soon as possible to find out the cause and then treat it.