Small abdominal pain after eating oranges may be due to acute gastroenteritis, irritable bowel syndrome and other diseases caused by the symptoms. 1. Acute gastroenteritis: eating oranges at the same time, there may be bacteria, viruses, fungi and other microorganisms into the body, will cause damage to the gastrointestinal mucosa causing acute gastroenteritis, nausea and vomiting, diarrhea, abdominal pain and other symptoms, can be treated by taking levofloxacin medication, if diarrhea is serious people, you can take montelukast for treatment. 2. Abdominal cold: eating oranges may cause abdominal cold, resulting in abdominal pain. 3. Irritable bowel syndrome: the patient himself has gastrointestinal dysfunction disease, clinical to increase the number of stools, abdominal pain as the main manifestation, you can use scopolamine to relieve the symptoms, scopolamine can lift the vascular smooth muscle spasm and improve the microcirculation, to achieve the purpose of relieving pain. Eating oranges abdominal pain, there may be other reasons, it is recommended to actively consult the doctor, improve the examination, clarify the cause of the disease, symptomatic treatment, the above drugs need to be applied under the advice of the doctor.