
Hello,
A complete medical history, clinical examination and work up are important for correct diagnosis and management. The causes related to nausea,diarrhea,
abdominal pain are food poisoinng,gastroenteritis,stomach flu, lactose intolerance, irritable bowel syndrome etc.Parasitic infestations like amoebiasis and giardiasis will also cause watery stools, abdominal cramps,nausea,fever etc.She should take a light diet and drink plenty of water. See a Paediatrician.