Likely scraped wall: Sometimes if you poo a bit too fast or the movement is too hard it will scrape the wall & create a crack in the skin of the outlet.This produces bright red blood in streaks on the stool or on the tp. This will self heal over time but can recur.Bleeding from higher up in the intestines begins to change color through darker reds/maroons/black.Your doc can confirm this.
Answered 2/25/2013
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