<s>[INST] My 9 yr old daughter came home with an upset stomach. She threw up and then went to sleep. She woke up 2 hours later complaining of a bad taste in her mouth and that she couldn t smell anything but she isn t congested. Also her head started hurting. She has a history of migraines. What could this be? [/INST] Hi, It seems your kid is having viral diarrhea. Once it starts it will take 5-7 days to completely get better.  Unless the kids having low urine output or very dull or excessively sleepy or blood in motion or green bilious vomiting. You need not worry. There is no need to use antibiotics unless there is blood in the motion. Antibiotics might worsen if unnecessarily used causing antibiotic-associated diarrhea.  Sometimes antibiotics like Metronidazole can cause such symptoms. Hope I have answered your query. Let me know if I can assist you further. Take care Chat Doctor.  </s>