I don't like to hand out advice.
I'm not comfortable with that.
If a relative found herself in this situation I would make suggestions.
These are not for you.
They would be for that relative that found herself there.
Get some magnification equipment.
A lighted 5x magnifying glass from the optical center at WalMart.
A 60/100 pocket microscope from Radio Shack.
A USB microscope/dermascope from Amazon to check the skin surface and take pictures.
Maybe a better microscope with more power and picture capability from amscope.com.
I'd tell her to use pieces of a high quality paper towel. Plain, no printing. Wet them and wipe skin surface.
These things especially seem to like the head. That's because there is a lot of blood there for the brain.
Take a look with the 5x before wiping, so she knows what the towel surface looks like, and then after wiping.
If some things picked up, take a closer look.
Lift them with a toothpick or pin/needle tip to a slip of paper for a closer look.
I'd help the relative get a bead on just what was causing the problem.
Might not be able to conclusively identify the critter but maybe could get an idea.
Then I'd look for them in the home environment.
Sometimes these things fall off people, they actually shed them.
Some things can free-live in the environment. Some for generations, some for shorter time spans.
It's even possible that finding some things in the environment doesn't necessarily mean they were shed by my relative.
They could have been there all along.
Every body could have been exposed due to environmental circumstance.
Many people are exposed to these things and many actually have them in their bodies to no noticeable ill effect.
If my relative had a disseminated/hyperinfection case as a result of an herbal program that does not mean that her kids are going to have a disseminated/hyperinfection problem.
Unless she applies the same herbal program to her kids.
Then all bets would be off.