ibuprofen taken over time can cause a stomach bleed but blood from the stomach will not show up bright red in the stool. it would be black as tar. a more likely source for bright red blood would be a location near the anal opening. a tiny fissure (tear) hemorrhoid skin tag etc. hold off on the ibuprofen and aspirin for now and see your medical provider. this is really the only way you could possibly find the source assuming the bleeding area has not already healed. you medical provider can give you some home stool-blood tests to do to check for any occult (hidden) blood that can be mixed with the stool and not obvious when using the toilet or wiping.
i just noticed blood in my stool but have been taking high doses of ibuprofen the last few days. is that the cause? . i've been taking higher than normal doses of ibuprofen due to having the flu. i think that's why i'm seeing blood in my stool but don't know if i should go to a doctor. i've noticed it just once it was bright red not dark. thanks for any input!