A week after the diarrhea is well, the stomach pain may be related to non-infectious factors such as cold, improper diet, or infectious factors such as acute gastroenteritis caused by bacteria and viruses. 1. Non-infectious factors: if the patient usually do not pay attention to warmth, may lead to the abdomen is cold, so that diarrhea after a week of pain in the stomach began to occur. In addition, the diet does not pay attention to hygiene, favor spicy stimulation of cold and raw food, may also lead to the above situation. 2. Infectious factors: bacterial infection, viral infection and other factors can lead to patients with acute gastroenteritis, there will be the above situation, but also may be accompanied by fever, watery stools, etc., the emergence of the above symptoms need to go to the hospital in a timely manner for routine examination of the stool. Diarrhea after a week of stomach pain may also have other causes, such as colitis, gastrointestinal dysfunction and other reasons, it is recommended to go to the hospital in time for relevant examinations, clear causes and actively treat the symptoms.