A doctor will tell you this

“What color is it?”

“Okay. If it continues for (amount of time) come back and give us more money for a sample”

Bright red = end of the colon, not serious. Hemorrhoids, colon wall blood vessel broken. I once ate a lot of sunflower seeds shells and all. Shit blood for a few days form that.

If it’s dark red it could be maybe serious. Could be IBS, blood vessels again just further up. You have to mention other symptoms.