Children sleeping on their stomachs may be caused by a sense of security, bloating and sleeping habits. 1. A sense of security: lying down to sleep will be more secure, the child will simulate the sleeping position in the womb, lying down to sleep high quality sleep, sleep more stable. 2. Bloating: may be due to the child has the symptoms of bloating, sleeping on the stomach can stimulate intestinal peristalsis, can alleviate bloating, help exhaust, which may be the phenomenon of small children sleeping on their stomachs. 3. Sleeping habits: small children may feel more comfortable sleeping on their stomachs, so often choose to sleep on their stomachs, even if parents correct the sleeping position of small children, small children will sleep on their stomachs. Children sleeping on their stomachs may also have other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.