A protruding belly is common in the middle age for which your doctor might suggest you some healthy foot habits, cutting down on alcohol, and regular exercise. But unusual distention of abdomen that grows and becomes abnormally visible might indicate something else. In certain medical condition, the distended abdomen could be due to fluid accumulation in the space between the lining of abdomen and other organs in the abdominal cavity. This condition is called “ascites” and it is a liver disease. It can be seen in children as well as adults.