Key Takeaways
- Bed bugs have nothing to do with being dirty or poor. Spotless homes and five-star hotels get them. The only “cause” is bringing them in.
- They spread by hitchhiking — on luggage, used furniture, secondhand clothes, and between adjacent units — not by flying (they can’t) or by poor hygiene.
- They don’t transmit disease. Bites can itch and cause lost sleep and stress, but bed bugs aren’t known to spread illness (CDC).
- Most “home remedies” are myths. Alcohol, bleach, UV lights, ultrasonic gadgets, and foggers don’t solve an infestation — heat and a real plan do.
There’s more misinformation about bed bugs than almost any household pest, and the myths cause real harm — people feel ashamed, blame themselves, or waste weeks on treatments that were never going to work. Here’s what actually causes infestations and which “facts” to ignore.
What actually causes bed bug infestations
Bed bugs are hitchhikers. An infestation starts when even one pregnant female is carried into a home, almost always one of these ways:
- Travel — picked up at a hotel, on public transport, or on a plane, riding home in your luggage.
- Used furniture and mattresses brought inside without inspection.
- Secondhand clothing and items, including some deliveries.
- Shared walls — they move between adjacent apartments and hotel rooms.
That’s it. Cleanliness has nothing to do with whether you get them — though clutter does give them more places to hide once they arrive.
Common bed bug myths, busted
- “Only dirty homes get bed bugs.” False. They feed on blood, not dirt; the cleanest home is just as vulnerable.
- “They’re too small to see.” False. Adults are about the size of an apple seed and visible to the naked eye — see how to check for bed bugs.
- “Bed bugs spread disease.” Not as far as research shows — the CDC notes they’re a nuisance pest, not a disease vector. The real toll is itching, lost sleep, and anxiety.
- “They only live in beds.” False. They hide in seams, frames, baseboards, outlets, and furniture across the room.
- “Rubbing alcohol / bleach / UV lights / ultrasonic repellers get rid of them.” They don’t — each is covered in its own guide.
- “A fogger or bug bomb will clear them.” False, and counterproductive — foggers don’t reach the cracks where bed bugs hide and can scatter them.
What to do instead
Skip the folklore and follow a real plan: heat and laundering, encasements, steaming, and monitoring, as laid out in our guide to getting rid of bed bugs. Bed bugs are beatable — with the right method, not the mythical one.
Frequently asked questions
What causes bed bugs in a house?
Bringing them in — almost always via travel, used furniture, or secondhand items. They don’t appear from dirt or poor hygiene; they’re carried in and then breed.
Are bed bugs a sign of being dirty?
No. Bed bugs feed on blood, not filth, and infest immaculate homes and luxury hotels alike. Clutter only matters because it offers more hiding spots.
Do bed bugs spread disease?
They aren’t known to transmit disease to humans. The main effects are itchy bites, disrupted sleep, and stress.
Can bed bugs fly or jump?
No. They can only crawl, which is why they rely on hitchhiking in luggage and belongings to get around.