What’s the reason for not being fat and having a big stomach?

Not fat but the stomach considerations may be visceral fat, long-term indigestion, digestive diseases and other factors.
1. Visceral fat: long-term alcohol consumption, overeating greasy fat food, sedentary and not exercise and other reasons will lead to excessive visceral fat, there will be a person is not fat but a very large stomach, this is called abdominal obesity.
2. Long-term indigestion: long-term indigestion can lead to long-term abdominal distension may lead to people are not fat but a big belly.
3. Gastrointestinal diseases: such as huge polyps in the intestines, stomach tumors, intestinal tumors and other diseases, such diseases will make the digestive function weakened, resulting in unexplained wasting, but the stomach may be very large phenomenon.
People fat but big stomach may also have other pathological factors, it is recommended to go to the hospital as soon as possible for examination and treatment.