Traveler's diarrhea may begin abruptly during your trip or shortly after you return home. Most people improve within 1 to 2 days without treatment and recover completely within a week. However, you can have multiple episodes of traveler's diarrhea during one trip. The most common signs and symptoms of traveler's diarrhea are: 
Abrupt onset of passage of three or more looser watery stools a day
An urgent need to defecate
Abdominal cramps
Nausea
Vomiting
Fever
 Sometimes, people experience moderate to severe dehydration, persistent vomiting, a high fever, bloody stools, or severe pain in the abdomen or rectum. If you or your child experiences any of these signs or symptoms or if the diarrhea lasts longer than a few days, it's time to see a doctor.