If my baby has a lot of bloody diarrhea should i take him to the er?

Yes: Make sure that he/she gets seen by a doctor to figure out where the blood is coming from.

Yes: Unarguably bloody diarrhea is not normal. Most pediatricians would prefer to evaluate this situation in the office first. While frightening, rarely does does bloody diarrhea require hospital admission. A small amount of blood mixed into a large portion of watery stool can suggest more blood than it actually is. However, if this occurs during non-office hours, then the baby should go to the er.

Yes: If it is clearly blood and large amounts of it, yes- it is best to be sure there if there is anything serious going on. Potential causes of bloody stools include: gastrointestinal infection (especially if high fever is present), food allergies, tear of blood vessels/bleeding polyps in the gastrointestinal tract (rare).