Patients with stomach pain and diarrhea and watery stools are often considered to be related to acute gastroenteritis and gastric mucosal ulcers or erosions, and it is recommended that patients actively seek medical attention for medication and pay attention to dietary regimen to improve the symptoms of stomach pain and diarrhea. Common causes and treatments are as follows: 1. Acute gastroenteritis: When patients have acute gastroenteritis, it can lead to digestive dysfunction and easily cause symptoms such as stomach pain, diarrhea and watery stools. If the symptoms are mild, the patient can temporarily fast from food and water and perform gastrointestinal decompression. If the symptoms are severe, the patient should go to the hospital and use digestive enzymes, montelukast, levofloxacin hydrochloride tablets, etc., as prescribed by the doctor to relieve the symptoms; 2. Gastric mucosal ulcer or erosion: When the patient has ulcer or erosion of the gastric mucosa, it may also cause stomach pain, diarrhea, watery stools and other symptoms. At this time, the patient should go to the hospital in time, and after clear diagnosis, he can use omeprazole, pantoprazole, thiosemicarbazone and other medications under the guidance of the doctor to relieve stomach discomfort as well as diarrhea symptoms. Precautions Patients should pay attention to dietary hygiene when eating and develop a good habit of eating regularly. It is recommended to eat a light diet, such as millet porridge or noodle soup and other foods, and avoid foods that are high in protein and not easily digestible, such as beef and pork, to avoid causing abdominal distention.