Always have bleeding checked out by your doctor. He may want to do a flexible sigmoidiscope in the office, or he may want to anesthetize you like doing a whole colonoscopy - depends on how much of your colon is left. That way, they can find where the bleeding is coming from. I have had rectal bleeding for the past 4 years. Radiation damage from the cancer treatments (before my ostomy surgery) caused an area to bleed, try to heal, break open again and bleed, etc. After a few scopes, they concluded that as long as I don't develop anemia there's nothing much they can do. Now I wear a panty liner to catch any blood seepage. Every five years I go back for another scope for them to check it out, and I eat a high-protein diet to replace any blood I lose, and my GP does blood work every year to keep an eye on it.
If your doctor scopes you and says it's OK and they will watch it, I wouldn't be too worried. Did you have any radiation or chemotherapy? Either of those could cause later bleeding. If the bleeding stops completely, probably nothing to worry about. If it comes and goes, remember to up the protein in your diet to compensate. Good luck, and do tell us how it goes!
