<s>[INST] my 4 year old has been complaining of a stomach ache for about 4 days now, she will be fine one minute and then will complain it hurts again. yesterday she puked and had runny bright green stool... now today she is crying her stomach hurts again and she just vomited, whats should i do? [/INST] Hi, Abdominal pain, loose stools and vomiting indicates acute gastroenteritis. If she don't have fever and stool does not contain mucus or blood, we need not worry. Give zinc syrup (20 mg / 5ml) 5ml once daily for 2 weeks and ondansetron syrup (2 mg / 5ml) 5ml 2-3 times a day for 2 days. Abdominal pain can respond paracetamol. Also give frequent sips of fluids like ORS solution after each stools to prevent deny Chat Doctor.  She will be fine in 3-5 days. If she develops fever, stool becomes blood stained or becomes lethargic with poor feeding, kindly take her to doctor. Hope I have answered your question. Let me know if I can assist you further.  </s>