Tummy aches in the middle of the night are common in clinical practice, and the specific causes include the following: one may be due to over-eating, or eating indigestible food, and tummy aches when the time is half over, accompanied by symptoms of indigestion, including nausea, vomiting or diarrhea. Another condition may be gastrointestinal spasm. Cold weather or a cold stomach during sleep can stimulate the umbilical cord or produce spasmodic pain in the intestines. This condition is more common in clinical practice, and there are also specific pains, such as enteritis and appendicitis, which are common in clinical practice and may lead to pain in the abdomen. Therefore, if your baby has stomach pain in the middle of the night, if the pain is severe, you should go to a regular hospital for detailed examination, pay attention to blood routine, stool routine and abdominal ultrasound to find the exact cause, and according to the cause for systematic and standardized treatment.