Help! Random spots of blood in cage!

[Bogertophis]

Usually it happens at the same time as the snake goes to the bathroom, or right after. But I have also seen snakes evert their cloacas slightly at other random times (briefly, and then everything goes back to normal).

Yes, I've seen that before too, though not in a long while. "Scraping bottom"- Pics of the blood left would help us diagnose- other than one "smear", I took it to be tiny random splatters & if it's from the snake's cloaca, it should mostly show up as a smear?