Baby pouting to sleep may be a physiological phenomenon, or indigestion, mesenteric lymphadenitis and other causes. 1. Physiological phenomenon: it is generally considered that it may be due to the baby’s insecurity, so it will simulate the position when in the uterine cavity, which is a normal physiological phenomenon, so do not worry too much. 2. Dyspepsia: the etiology of this disease is not clear, it may be related to visceral hypersensitivity, gastroduodenal motility dysfunction, Helicobacter pylori infection, anxiety disorders and other factors. Because the child will experience abdominal pain, bloating, heartburn and other discomforts, the child will relieve the discomfort by adjusting the sleeping position, followed by pouting to sleep. 3. Mesenteric lymphadenitis: this disease is caused by bacterial, viral, parasitic infections, typical symptoms of fever, abdominal pain, diarrhea, and so on, and when the child pouting to sleep, to a certain extent, may relieve the discomfort. Baby pouting to sleep, there may also be 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.