Stomach pain, watery stool is usually caused by acute gastroenteritis, food poisoning and other reasons, different diseases with different drugs, can follow the doctor’s instructions to use montelukast, ofloxacin and other drugs for treatment. 1. Acute gastroenteritis: acute inflammation of the gastrointestinal mucosa caused by pathogenic microbial infections and other factors, the patient may appear stomach pain, nausea, vomiting and other symptoms, and a significant increase in the number of stools or drainage-like stools. If dehydration occurs, oral rehydration salts should be taken as prescribed by the doctor to improve the symptoms. In addition, oral montelukast may be prescribed to adsorb intestinal toxins and protect the intestinal mucosa. If the diarrhea is severe, oral loperamide can be taken. If the diarrhea is caused by bacterial infection, antibiotics for sensitive bacteria, such as ofloxacin, norfloxacin, sulfamethoxazole, etc., can be used as prescribed by the doctor. 2. Food poisoning: it can also cause stomach pain, watery stools, and can be accompanied by vomiting, diarrhea, headache, dizziness and other symptoms, usually occurring within a few hours to a day after eating toxic substances. Should immediately seek medical attention, follow the doctor’s instructions for vomiting, gastric lavage, diarrhea, if there is dehydration, electrolyte disorders, intravenous glucose injection, potassium chloride injection, etc., vomiting, abdominal pain is obvious, can be used propylenetine, pivoxyl bromide, etc.. In addition, the stomach pain watery stools may also be bacterial dysentery and other diseases, it is recommended to go to the hospital in a timely manner, to clarify the cause of the disease, early treatment.