It can either be a problem at your livers or just common
intestinal gas.
Abdominal distention is a common condition,
which usually results from over-eating, rather than from a serious
illness. Simple weight gain, premenstrual syndrome (PMS), pregnancy, or the
unconscious swallowing of air can also cause
distention.
Abdominal distention is often caused by intestinal gas. This may
result from eating fibrous foods such as fruits and vegetables.
Legumes such as beans are common sources of intestinal gas. People
who are lactose intolerant cannot properly digest dairy foods, and
eating such foods may cause distention.
Abdominal distention may also occasionally result from the
accumulation of fluid in the abdomen, which can be a sign of
serious medical problems. There are usually other symptoms in this
case.
Causes