Hepatitis B, like all other diseases, is divided into mild and severe cases. In relatively mild cases of hepatitis B, if there is bloating, it is not a big problem because it is a result of the decrease in the function of the liver after the liver is attacked by the hepatitis B virus, which leads to a decrease in the ability of the liver to secrete bile and to break down glycogen, which cannot fully participate in the digestion and metabolism of food, resulting in the disruption and decline of gastrointestinal function. As the food residues are not fully digested and absorbed in the gastrointestinal tract, they stay too long and the gas produced causes distension and pain in the gastrointestinal tract. In addition, in the case of severe liver disease, in addition to the above-mentioned reasons, the emergence of a large amount of ascites will also cause abdominal distension and pain afterwards, therefore, stomach distension cannot indicate the severity of hepatitis B disease.