Stomach pain, diarrhea and fever may be caused by stimulation of external factors, acute gastroenteritis, gastrointestinal type of cold, and need to be treated symptomatically after clarifying the specific cause. Common causes and treatments 1, external factors stimulation: excessive consumption of spicy, greasy and other irritating food, abdominal cold, emotional stimulation, etc., may lead to spasm of the gastrointestinal tract, causing stomach pain, diarrhea, low-grade fever and other symptoms. Usually the onset is fast and recovery is also fast. Oral montelukast can be taken to stop diarrhea and scopolamine to fight spasm; 2. Acute gastroenteritis: If you consume unclean food, infected with E. coli, salmonella, norovirus, amoeba, etc., abdominal pain and diarrhea and fever occur, you can use gentamicin, levofloxacin, flavopiridol, metronidazole and other drugs symptomatically; 3. Gastrointestinal flu: It can trigger gastrointestinal symptoms, including stomach pain, Diarrhea, fever, vomiting, nausea, etc., can take ibuprofen or acetaminophen to reduce fever, with omeprazole to protect the gastric mucosa. Take note that the gastrointestinal tract has reduced digestive function at this time, so you should pay special attention to your diet. Eat warm and soft liquid foods such as millet porridge and corn paste, which are easy to digest and can replenish the water lost from diarrhea; drink more warm water and eat more fresh fruits; pay attention to keeping the abdomen warm, avoid getting cold and ensure sufficient sleep.