Diarrhea may be accompanied by cramping, abdominal pain, bloating, nausea, or an urgent need to have a bowel movement. It may be loose or watery. Sometimes diarrhea may be accompanied by fever or bloody stools and/or severe pain in the abdomen or rectum, any of which are NOT symptoms of IBS. If you experience these symptoms, your diarrhea lasts for more than 2 days or if you suffer from dehydration, you need to see your doctor

Signs of dehydration may include thirst, infrequent urination, dark-colored urine, dry skin, fatigue, light-headedness. If you have a child with diarrhea, watch carefully for additional indications of dehydration which may include dry mouth, tearless crying, dry diapers, sunken abdomen, eyes, or cheeks. It is very important to contact your doctor immediately if your child has diarrhea for more than 24-hours.

Source:
Canadian Digestive Health Foundation, www.cdhf.ca