That's because of hunger, so children should eat wild fruits and vegetables and so on.

There are more bacteria in the tropics than in the temperate zone, and there are many children who are not taken care of, and many things they eat are raw.

Needless to say, the water they drink is rarely boiled.

In this case, bacteria can easily enter the stomach and large and small intestine.

Their bellies are big not because they have a lot of fat, but because these bacteria multiply in the body and produce edema and other internal phenomena.