Why when I poop I wipe my self I see light pink blood?

See a doctor. Blood in the stool is not normal. It suggests there may be a bleed somewhere in the GI tract but this could be anywhere from your mouth with blood you are swallowing, to your stomach due to an ulcer, to an internal or external hemorrhoid. A physician will be able to examine your stool, and take a complete history to determine which tests and necessary to determine the cause of bleeding.