 [ Symptoms ] i had terrible tooth and gum pain on the right side of my mouth with both upper and lower teeth dentist does not see anything wrong [ Disease ] diarrhea is not a symptom that is consistent with influenza influenza is a respiratory disease with fever yes it can be as high as 103 and coughing body aches chills etc if your daughter is having severe diarrhea influenza is not the cause and a flu vaccine would not have prevented this gastroenteritis she most definitely picked up a pathogen of some sort usually a virus but she will need to see a medical provider for a proper examination