There is no necessary causal link between children sleeping on their stomachs and what is lacking. Causes of children sleeping on their stomachs, mainly including the following situations: first, the normal phenomenon of children. Some children like to sleep on their backs, especially if there is heat in the body, children will feel comfortable sleeping on their backs. Secondly, children suffering from indigestion caused by symptoms. After the child suffers from indigestion, there will be abdominal distension, abdominal pain and other symptoms, this time the child sleeps on his stomach will feel the pain in the abdomen to be relieved. Finally, children in indigestion will cause chest, abdomen feel irritable, sleep on the stomach can also play a certain role in relieving. In summary, children sleeping on their stomachs is mainly related to internal heat and indigestion, and the lack of what has little to do.