Junior high school students have stomach pain for no reason, it may be the abdomen is cold to stimulate the gastrointestinal tract, or have acute gastroenteritis as well as acute appendicitis and other diseases. 1. Abdominal cold: If the recent low temperature, and the patient is wearing thin, due to abdominal cold, abdominal muscle spasms, thus stimulating the gastrointestinal tract, resulting in gastrointestinal spasms, the patient may appear abdominal pain, this time available hot towels on the abdomen for 15 minutes, and then do massage, generally after rest can be relieved. 2. Acute gastroenteritis: If in the stomach pain at the same time, but also vomiting, diarrhea, fever and other symptoms, and the recent diet unclean or irregular, most likely acute gastroenteritis, at this time can be rehydration, to correct the electrolyte balance, and at the same time take loperamide and other medications to alleviate the symptoms. 3. Acute appendicitis: patients with acute appendicitis, often for sudden, metastatic abdominal pain, followed by vomiting and fever and other symptoms, then need to go to the hospital for surgical treatment. All of the above medications should be used under the guidance of a doctor to avoid self-medication.