The main reasons for infant tummy time are as follows: 1, infant gastrointestinal peristalsis is relatively slow, because infants are less active, most of them are in a bedridden state. If the child drinks less water, it will lead to weaker intestinal peristalsis, which will lead to tummy retention. 2. If the infant adds supplementary food poorly, such as vegetables or fruits, it will not be easy to stimulate intestinal peristalsis, which will lead to tummy retention. 3. When respiratory or gastrointestinal diseases occur in children, they are usually accompanied by irregularities in the function of the spleen and stomach, which also lead to slow gastrointestinal peristalsis and tummy retention. The situation of tummy, but also may have hiccups, acid reflux, belching, or abdominal distension and other phenomena occur. Parents can cooperate with the belly button as the center of clockwise abdominal rubbing, at the same time in daily life to drink more water, through the slow adjustment of diet, if necessary, can be added to the oral mamma-aid or probiotics and other drugs to adjust the flora of the intestinal tract of children.