What to do if only happened to me about 5 times in my whole life that i saw blood in my stool,what can be the cause?

G.I. bleeding: There can be many causes of intermittent G.I. bleeding. They range from mild problems like hemorrhoids to significant problems like: polyps or colon cancer. Because we can't tell by looking at the blood itself, it is important to be evaluated by a gastroenterologist anytime there is bleeding, even if it is just once. Do not delay. This appointment could save your life. Good luck.