Your case sounds very familiar to me. We have been researching strange and unusual skin invasions by fungi and parasites as well as parasitic fungi and we've recently made some great discoveries in the field. I think your friend should contact us so we could present a few symptomatic questions to her to see if we may be able to help her. If anyone else suffers from strange skin conditions like tiny black specks coming from the skin pores, white granules coming from skin, strange fibers protruding from skin, or other conditions such as Lyme disease, they, also should get in touch with us.
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We have the exact same thing - bites from insects you can't see. And we are sure they are bites, you can almost feel the biting. Did you get this resolved?
I am doubtful about your diagnosis of bugs. You can see bugs. You may have an itchy rash that makes your flesh crawl as though you have bugs, but you can't diagnose bugs of they can't be seen (insects are not microscopic.) This does not sound like mites or fleas either. I cannot think of a relationship with your plant.
I suggest you treat the itch (Saran lotion, oral Benadryl, both OTC) and see a skin doctor. If you do find any bugs, put them in a baggie and bring them in.
Take care.
Dr. Rockoff