There are many causes of pain in the lower right abdomen while eating, which may be due to acute gastroenteritis, acute appendicitis, intestinal tuberculosis and so on. 1. Acute gastroenteritis:Most of them are caused by food poisoning due to eating unclean food, usually accompanied by severe vomiting, diarrhea, fever and other symptoms. 2. Acute appendicitis: most of the patients are transferred from epigastric pain to right lower abdominal pain, and the pain reaches its peak in about 4~6 hours, at this time, even because of coughing or moving the body to make the pain worse. 3. Intestinal tuberculosis:It can manifest with abdominal distension, diarrhea, abdominal pain, and accompanied by systemic symptoms. Abdominal pain is mostly located in the right lower abdomen or around the umbilicus, often paroxysmal abdominal pain, accompanied by intestinal tinnitus, can also be a persistent pain in the right lower abdomen, abdominal pain can be irregular, can also be triggered by eating. In addition to the above, there are other conditions that may lead to hidden pain in the lower right abdomen when eating, such as perforated gastrointestinal ulcers, etc. It is recommended to go to the hospital for examination, and follow the doctor’s instructions for timely and targeted treatment, so as not to delay the course of the disease.