Help! Random spots of blood in cage!

[Bogertophis]

No because I changed her paper towels last night so it happened sometime last night.

Also I should clarify 73 at night sometimes but during the day anywhere from 76-79

(I can't give a picture because I don't know how) but I can describe it... She has two black breeder hides, 5 plastic plants suctioned to the walls that she loves to fall from, a glass water dish, a digital thermometer and humidity, paper towels for substrate, glass enclosure with a back drop along the back and sides. (I plan to do a bioactive enclosure this summer)

The spots show up maybe like twice every three months. Mind she also falls from the suctioned plants and is very rough every night.

Okay, I'd take out the plastic plants & see if there's any more blood spots. Plastic plants usually have sturdy wires for support, that are coated & have leaves added- when leaves come off (after a snake climbs on them), it exposes sharp wires that can injure your snake- tiny puncture wounds between scales will not show up easily- they could bleed briefly before stopping, leaving you wondering where the blood came from. The danger, would be the same for snakes as it is for us- a deep puncture wound that gets infected with anaerobic* bacteria. (*examples- tetanus & gangrene are caused by anaerobic bacteria) Not to mention that frequent falls onto a hard surface aren't very good for a snake's body either- best prevented.