Alternating stomach and tummy pains may be caused by diseases such as acute gastroenteritis, irritable bowel syndrome, peritonitis, or other diseases such as intestinal obstruction. 1. Acute gastroenteritis: Acute gastroenteritis is caused by bacterial, viral, parasitic and other pathogenic infections, as well as stress, drugs and other factors. The main symptoms of patients are abdominal pain, diarrhea, vomiting, etc. Abdominal pain is mainly dominated by middle and upper abdominal pain. 2. Irritable bowel syndrome: the cause of irritable bowel syndrome is not yet clear, mostly due to immunity, food and other factors. Patients will have abdominal pain, abnormal bowel movements, constipation, etc. The location of abdominal pain in patients with irritable bowel syndrome will change and will recur. 3. Peritonitis: Peritonitis is mainly caused by diseases in the abdominal cavity, and the typical symptoms of patients are abdominal pain, nausea, vomiting and fever. Peritonitis patients with abdominal pain will spread to this abdomen with the inflammation, so patients will have alternating stomach and stomach pain. 4. Other: intestinal obstruction, appendicitis and other diseases can also lead to the phenomenon of alternating pain in the stomach and stomach. When patients have symptoms of alternating stomach and stomach pain, they should consult a doctor in time and follow the doctor’s instructions.