14-year mystery: microscopic crawling/jumping/biting sensations associated with textiles and humidity — looking for help identifying the cause
This is going to sound strange, but I've been dealing with this for about 14 years and I'm hoping someone with experience in entomology, mites, springtails, environmental pests, or microscopy might be able to point me in the right direction.
First, I'm not claiming that I have discovered a biting springtail or some new parasite. Springtails are simply one possibility I've considered because some of their environmental characteristics seem to fit. I could be completely wrong.
What I really want at this point is to capture and identify whatever is present—or establish objectively that there isn't an arthropod present.
How it started
This started very abruptly when I was about 22.
I was extremely healthy, athletic, and had never experienced anything remotely like this before.
I used a laundromat, brought my laundry home, and left the clean clothes/bedding sitting in a clean hamper for about a week.
When I finally put those sheets on my bed, I woke up that night with what felt like thousands of extremely tiny things crawling, jumping, pinpricking/biting, and moving across my skin.
It was literally an overnight change. I had never experienced the sensation before using those sheets.
That was roughly 14 years ago, and I've been trying to understand it ever since.
The strangest part: it seems associated with my belongings, not permanently with me
Over the years, certain clothing, bedding, furniture, rooms, and vehicles seem to become associated with the sensations.
If I shower, leave everything behind, travel somewhere with completely new clothing, and stay in a clean environment, I can have essentially zero symptoms.
If I bring affected textiles/belongings with me, the problem can eventually appear in the new environment.
I've moved houses and changed vehicles and still experienced this after transferring belongings.
Whatever is responsible also seems incredibly persistent. I've tried normal washing, clothes dryers, freezing, cleaning, etc., without reliably eliminating it.
I've left rooms/houses alone for months and returned expecting the problem to have died out. Instead, the apparent activity can sometimes be worse, almost as though the population increased while I was gone.
That is one reason I've questioned whether this could be an ordinary parasitic mite that requires a host.
Humidity and temperature make a HUGE difference
I live in Florida, so most of my experience has unfortunately been in a warm, humid environment.
The apparent activity seems to absolutely thrive around roughly 75–80°F with high humidity (~75% RH).
Under those conditions, it can seemingly explode.
I can't actually count organisms because I can't reliably see anything with my naked eye. When I say "thousands," I'm describing the sheer frequency of the sensations: crawling, rapid movement, jumping sensations, and sharp pinprick/biting-like sensations occurring constantly.
Cold/dry conditions produce almost the opposite effect.
When I'm somewhere snowy, cold, or very dry—particularly if I've brought completely new clothing—the problem can essentially disappear.
This strong moisture dependence is one of the reasons I eventually started researching Collembola/springtails.
My dogs appear to react too—but this started BEFORE I owned dogs
This is another part that makes the situation interesting to me.
I've had this problem much longer than I've had my dogs, so they definitely weren't the original source.
However, after my dogs live in an affected environment, during periods when the apparent activity becomes intense, they can start scratching almost nonstop.
When I treat the environment and the activity decreases, their scratching can decrease too.
I'm not claiming this proves they're being bitten. There could be another environmental explanation. But the correlation has been noticeable enough that I think it's worth mentioning.
Pesticides/environmental treatments can dramatically reduce it
This is probably the biggest reason I keep coming back to an arthropod explanation.
I've spent years wondering whether I simply had some bizarre neurological or dermatological problem.
I've seen doctors, including dermatology/internal medicine, and have undergone extensive medical workups without finding an explanation.
There were actually years when I mostly gave up trying to solve it and just lived with it.
But here's what keeps bringing me back:
Treating an affected environment can dramatically reduce or temporarily eliminate the sensations.
I've had vehicles where the crawling/jumping sensations were extremely noticeable. After treating the vehicle with an insecticide, they dropped dramatically or disappeared for a period.
Pyrethroid-type insecticides have worked at various times, although they sometimes seem less effective after repeated treatments. I realize I cannot call that "resistance" without actually identifying the organism and testing it.
More recently, I thoroughly cleaned an affected environment using an ammonia/alcohol-based cleaner. After treating the ceiling, walls, flooring and affected areas, the crawling/jumping/pinprick sensations dropped to almost zero.
That's obviously not scientific proof of an insect. There could be confounding variables.
But when something has been happening for 14 years and repeatedly changes after environmental treatment, it's difficult for me to ignore.
I have not simply sprayed pesticides over every room, bed, and piece of clothing I own because I don't want to chronically expose myself or my dogs to pesticides—especially when I don't even know what I'm trying to kill.
Why I've wondered about springtails
I understand that accepted entomology says springtails don't parasitize or bite people. That's actually the mystery.
But several characteristics seem oddly similar:
• Strong dependence on moisture/humidity
• Thrives in warm, humid environments
• Activity drops dramatically in cold/dry environments
• Sensations resembling extremely fast crawling/movement
• Distinct jumping sensations
• Apparently capable of persisting in buildings for extremely long periods
• Seems capable of persisting without a human host
• Appears associated with textiles/organic material
• Can seemingly become extremely numerous very quickly
I also experience what feels like different levels or stages.
Sometimes it's incredibly subtle—almost like tiny/light movement across the skin.
Other times the sensations are much stronger: rapid crawling, jumping and sharp pinpricks that feel like bites.
I don't know whether that represents different life stages, different organisms, population density, environmental conditions, or something completely unrelated.
One particularly strange characteristic is that whatever causes this seems capable of surviving perfectly well without me, yet activity seems much more noticeable around a warm person or animal.
That makes me wonder whether—if an organism actually exists—it normally lives on fungus, microorganisms, organic debris, textiles, etc., but is attracted to warmth, moisture, CO₂, sweat, or something else associated with mammals.
Again, that's just speculation.
Not everyone around me feels it
Not everybody entering an affected environment reports the same thing.
I realize that's an important point.
But I don't think subjective sensation can answer this question either way. Different people could have very different sensitivity to tiny arthropods, allergens, fibers, static electricity, skin irritation, or whatever else might be occurring.
After 14 years, I don't really care whether my springtail theory turns out to be completely wrong.
Really looking to the community to see if anyone has solved this completely. I'm ok using pesticides just tell me what you did and how much, often, etc. However this thing seems so insanely adaptive and hardy and multiplies sooo fast. Literally seem like a bio-weapon. Again I have successfully removed them from my truck with IGR and Bifen but it took about 2-3 treatments in a week or so...I'm not sure I can do that to my entire house safely?
Has anyone encountered anything remotely similar?
More importantly:
And are there organisms other than springtails that could potentially explain the combination of:
extreme moisture dependence + rapid movement/jumping + persistence without a host + textile/environment association + apparent attraction to humans/animals?
I'm completely open to being wrong about what it is.
I'm not looking for someone to confirm my theory.
Is there actually an arthropod or other organism consistently present in the affected material, and if so, what is it?