That's okay, better to ask, but yes, sometimes it's just that a little bit of shed gets stuck in a "sensitive area" (their cloaca) & makes it bleed a bit when they shed. If it's any MORE than just a few dots though, by all means get it looked into by a qualified herp vet. Sometimes snakes can prolapse tissue from the cloaca, & that needs immediate treatment, or they might have a urate stone that causes irritation (a little bleeding from cloaca), or other things could be wrong, so you did right to ask...bleeding should ALWAYS get your attention, just in case.