The causes of tummy pain in eight-year-old children may be the following: 1. It may be acute gastroenteritis, caused by eating unclean, cold, or irritating things, which can manifest as nausea, vomiting, diarrhea, accompanied by paroxysmal spasmodic pain around the umbilicus. 2. The cause of tummy pain in children may be acute appendicitis, which is usually metastatic right lower abdominal pain. 3. It may be caused by typhoid, tuberculosis, etc. tummy pain, etc. If you find that your child has stomach pain, it is recommended that you go to a specialist hospital to improve the relevant examination and clarify what the cause of the stomach pain is, and then take different treatments according to different causes.