If constipation is a problem, check temp. If not gone in a few days, find a vet, antibiotics are necessary. However, if found, they must be removed immediately. Be very careful when removing ticks, an imbedded head can cause a nasty infection. A good cleaning should rid a flea problem.
Mites are another story.
They are blood sucking arthropods closely related to ticks. The common snake mite almost always arrives on a snake from a pet store or other infested location. They are VERY small and are hard to see. Put the Strip in a cardboard or plastic container with holes in it. The insecticide can come out, but the snake can't touch the strip.