hi have bleeding from the bowel, started with constipation, then had diarrhea and vomiting, was unable to eat for 12 hours as i just threw up again, but have passed bloody liiquid a few times in the next 12 hours since without their being any fibre in it, the blood smells rotten and is purple, there is no pain as such apart from occasional low level shots of pain in the bowel area, i have been able to keep food down for this period of 12 hours but am a little concerned about this blood i am 43 , smoke 2 - 3 cigarettes a day, no alcohol and drink about 3 - 4 cups of coffee per day