An enlarged abdomen may be caused by liver problems, obesity, pregnancy and other reasons. 1. Problems with the liver: cirrhosis of the liver leads to a large number of ascites, will make the abdomen larger, at this time generally indicates that the liver disease has reached a very serious level. 2. Obesity: obese people will accumulate a lot of fat under the skin of the body, especially in the abdominal fat accumulation is particularly obvious, so the obese people mostly give a feeling of a big belly, the abdomen will be obviously larger. 3. Pregnancy: generally only occurs in the female group, due to the development and growth of the fetus in the uterus, constantly getting bigger and bigger, the mother’s abdomen will also be bigger and bigger, and with the increase in months of pregnancy, the abdomen will gradually increase in size, until the birth of the child. There may be other reasons for an enlarged abdomen, so you can go to the hospital for a complete examination to clarify the situation.