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WOW have the phones been ringing like crazy this week!
Seems like everyone has a question or two about dust mites. We've noticed there are a lot of misconceptions about what dust mites actually do — and more importantly, what they don't do. We want to set the record straight.
Dust mites are a major allergen producer but they don't do a lot of the things people think they do. Here are the seven most common myths we hear — busted.
Want the full scientific picture first? Read What Are Dust Mites and Why Are They So Hard to Eliminate?
Myth #1 — Dust Mites Are Biting Me
No — dust mites cannot bite you. They do not have a mouth with teeth. Instead they have an opening that scoops up shed bits of skin. Rather than chewing their food the way we do, they secrete an enzyme that breaks food down and begins digestion outside the body.
Dust mites don't have a mouth, they don't have teeth, they don't chew, and dust mites don't bite.
If your skin itches, it is almost certainly an allergic reaction to the proteins found in dust mite waste products and decomposing body fragments — not bites. The protein triggers your immune system; your immune system triggers the itch.
Myth #2 — I Can Feel Dust Mites Crawling on Me
A dust mite is about a quarter of a millimeter — far too small to see with the naked eye and far too small to feel walking on your skin. You would need at least a 10x magnification microscope to see one.
Dust mites may hitch a ride on your clothing, but they do not live on people. They cannot survive on human skin — they need the warm, humid microenvironment inside mattress and pillow fibers. If you feel something crawling, it is not a dust mite.
Myth #3 — Dust Mites Are Escaping from My Vacuum
Dust mites are not mobile enough to crawl out of your vacuum. They are slow-moving creatures that spend most of their lives in one place.
What can escape from a poorly sealed vacuum is something else entirely — the dust mite allergen particles themselves, which are light enough to become airborne when disturbed. Dust mite particles, dead body fragments, shed skins, and fecal matter will all escape through a vacuum's exhaust if the filtration is inadequate.
This is why vacuuming with a HEPA-filtered, fully sealed canister vacuum matters. A bagless vacuum empties its contents directly into the air you breathe. A HEPA-filtered canister captures allergen particles rather than redistributing them.
Myth #4 — Dust Mites Are Flying Around My House
Dust mites have no wings. They cannot fly — and they cannot jump either. They spread through the home on bedding, clothing, and air currents carrying dust particles, not by flying under their own power.
What does become airborne is dust mite allergen — the microscopic waste particles and body fragments that are light enough to be suspended in air when surfaces are disturbed. That is the airborne problem, not the mites themselves.
Myth #5 — I Can Feel Them Under My Skin
Those are not dust mites. Dust mites do not burrow into human skin — they live in fabric fibers, not on or in people.
If something is burrowing under your skin, the most likely culprit is scabies — a completely different organism (a parasitic mite, not a dust mite) that does burrow into skin. That requires medical diagnosis and treatment. Dust mites are not the cause.
Myth #6 — They Are Chewing Through My Mattress Cover
Dust mites don't chew — they have no biting mouth parts at all. If something is getting through your mattress cover, the cover either has a gap, a failed seam, or is not a true allergen-proof encasement.
What people sometimes feel through a poor-quality cover is not mites chewing through — it is allergens migrating through inadequate fabric with pore sizes too large to block them. A true allergen-proof encasement has a pore size under 10 microns and fully sealed seams. A regular mattress pad does not.
If something is actually biting you in bed, that is more likely bed bugs — an entirely different problem that also requires a different solution. A quality allergen-proof encasement protects against both dust mites and bed bugs when properly fitted with a sealed zipper.
→ How to choose a true dust mite cover — and what makes one effective
Myth #7 — If My Home Is Clean, I Don't Have Dust Mites
This is one of the most persistent myths — and one of the most discouraging for people who work hard to keep a clean home.
Dust mites feed on shed human skin cells. Every person sheds approximately 1.5 grams of skin per day regardless of how clean their home is. Cleanliness reduces dust accumulation on surfaces, which helps — but it cannot eliminate the food supply inside mattress and pillow fibers where dust mites actually live.
Sadly, you can be the cleanest person in the world and still have a significant dust mite problem. It is not a reflection of how clean your home is. It is a reflection of the fact that we all shed skin continuously, we all sleep in the same spot night after night, and mattresses are exactly the environment dust mites evolved to exploit.
So What Actually Helps?
Knowing what dust mites don't do is useful. Knowing what actually reduces your exposure is what matters.
The short answer: allergen-proof encasements for your mattress, box spring, and pillows. Weekly washing of sheets and pillowcases. Humidity control below 50%. HEPA air filtration in the bedroom. Anti-allergen sprays for surfaces that cannot be encased.
→ 6 highly effective ways to get rid of dust mites
→ Shop allergen-proof mattress and pillow covers
Still have questions? Give us a call at (800) 771-2246. We have been helping people understand and manage dust mites since 1989.
Want the complete picture? Everything on this page is part of our free Practical Guide to Allergy-Free Living — 35 years of allergy expertise covering dust mites, pet dander, air quality, laundry, and more.