Frequent stomach pain and diarrhea are the result of irritable bowel syndrome, chronic gastroenteritis, improper diet, and improper lifestyle habits. Irritable bowel syndrome is triggered by more causes, such as bad emotions and intake of allergic foods. During an attack of irritable bowel syndrome, intestinal dysfunction is the main symptom, so symptoms such as gastric distension, stomach pain and diarrhea can occur. Acute irritable bowel syndrome develops chronically if it is not treated properly or if the disease is delayed. Patients with chronic gastroenteritis have a relatively low immune system, and the disease recurs frequently, so they often have stomach pain and diarrhea. The spicy and oily foods that are often eaten in the diet will not only stimulate the mucous membrane of the digestive system and cause stomach pain, but will also stimulate the intestinal mucous membrane and cause diarrhea. Many people usually do not pay attention to body warmth, will spend a long time blowing air conditioning, wear open-necked clothes, overeating and other bad habits, will also affect the function of the gastrointestinal system and stomach pain, diarrhea.