Eating a meal and pulling once considered for cold and other physiological factors and irritable bowel syndrome, acute gastroenteritis, ulcerative colitis and other pathologic factors caused by. 1. Physiological factors: such as wearing too thin, overeating, eating too much ice cream and other cold foods, increasing the burden on the stomach and intestines, stimulating the gastrointestinal mucosa, causing diarrhea, abdominal pain, abdominal distension and other symptoms. 2. Pathological factors: (1) irritable bowel syndrome: no organic lesions, only intestinal dysfunction of a group of diseases, with mental, psychological, genetic, environmental and other factors, can be manifested as abdominal pain, abdominal distension, diarrhea, nausea and other symptoms. (2) Acute gastroenteritis: often caused by dietary impurity, etc., the gastrointestinal tract is infected with pathogenic microorganisms such as bacteria, viruses and fungi through food, and there are symptoms such as diarrhea, urgency and heaviness (discomfort in the lower abdomen, wanting to relieve the bowel movement, and feeling of incomplete defecation after defecation), nausea, vomiting, and abdominal pain. (3) Ulcerative colitis: a group of inflammatory bowel diseases related to genetics, immunity, etc. The main symptoms are diarrhea, abdominal pain, mucous blood stools, etc., which can also be accompanied by symptoms such as weight loss and loss of appetite. Eat a meal to pull once may also be caused by bacillary dysentery and other diseases, it is recommended to consult a doctor to clarify the diagnosis, under the guidance of the doctor for targeted treatment.