A burst of pain in the stomach after eating pizza is considered to be gastroenteritis caused by improper diet, and should be promptly diagnosed to identify the cause of the disease, and follow the doctor’s instructions to standardize the treatment. A burst of pain in the stomach after eating pizza is considered to be a manifestation of gastroenteritis caused by improper diet (irregular diet, overeating or unhygienic diet). Patients often experience epigastric pain, diarrhea, abdominal distension, nausea, vomiting, or symptoms of indigestion such as postprandial fullness, lack of appetite, and acid reflux. Patients with significant abdominal pain can use drugs such as atropine and scopolamine under the guidance of a doctor as appropriate to relieve symptoms. However, other factors can not be completely ruled out caused by, it is recommended that the patient timely consultation, by the doctor to clarify the cause of the disease, give targeted treatment. During the treatment, special attention should also be paid to dietary care, to develop good eating habits, which is conducive to controlling the condition.