Diarrhea may be accompanied by cramping abdominal pain, bloating, nausea, or an urgent need to use the toilet. Depending on the cause, a person may have a fever or bloody stools. Diarrhea can be either acute or chronic. The acute form, which lasts less than 3 weeks, is usually related to a bacterial, viral, or parasitic infection. Chronic diarrhea lasts more than 3 weeks and is usually related to functional disorders like irritable bowel syndrome or diseases like celiac disease or inflammatory bowel disease.
Dehydration can occur in some cases of diarrhea.
General signs of dehydration include thirst, less frequent urination, dry skin, fatigue, light-headedness, and dark colored urine. If you suspect that you are dehydrated, call the doctor immediately. Severe dehydration may require hospitalization. Although usually not harmful, diarrhea can become dangerous or signal a more serious problem. You should see the doctor if You have diarrhea for more than 3 days.