Most cases of diarrhea are nothing serious and nothing to worry about.
However diarrhea can sometimes be serious and cause you to become dehydrated.
If the diarrhea lasts longer than 2 days or gets more severe then you should see a doctor because diarrhea that lasts too long can dehydrate your body.
If you cannot get the diarrhea to stop within a few days and you're constantly on the toilet you should go to the doctor or if you're really dehydrated you should go to the emergency room for treatment.
If you experience symptoms of dehydration from the diarrhea such as excessive thirst, dry mouth or skin, little or no urination, severe weakness, dizziness or lightheadedness, or dark colored urine always get medical attention.
If you do have severe diarrhea taking some diarrhea medicine can sometimes help stop the diarrhea but sometimes you need to see a doctor about it.
Always keep hydrated by drinking plenty of water or other hydrating fluids when you have diarrhea.