most definitely yes. blood in the stool in never normal and from what you have described it is very serious indeed. if you have lost a significant amount of blood through this it can be a life-threatening situation.
should i g to er for bloody bowel movements. started with. diarrhea vomiting tingling hot and sweaty and then i passed out. had diarrhea for next 3 hours and then it turned to nothing but blood when i need to have a bowel movement. (ever 20 min. or so. ) i have been having these blood bowel movements for almost 24 hours. still have extreme pain in center of my lower abdomen. do i need to go ahead and go to the er