People get bed bugs by unknowingly carrying them from one place to another. Bed bugs don’t fly or jump. They crawl onto luggage, clothing, bags, and furniture, then ride along to your home. This process, called hitchhiking, is responsible for nearly every new infestation. Bed bugs have nothing to do with how clean your home is.
Travel Is the Most Common Source
Hotels, motels, and vacation rentals are where most people first encounter bed bugs. The bugs hide in mattress seams, headboards, and bed frames during the day, then emerge at night to feed. When you set your suitcase on the floor or bed, they can crawl inside. They also climb into book bags, outer garments, and loose clothing left near sleeping areas.
You won’t feel them crawling on your things. Adult bed bugs are roughly the size of an apple seed, and young ones are nearly translucent. A single pregnant female hitching a ride in a suitcase pocket is enough to start a full infestation at home, since she can lay hundreds of eggs over her lifetime.
Used Furniture and Thrift Store Finds
Secondhand mattresses, sofas, and upholstered chairs are high-risk items. Bed bugs hide in tiny holes, cracks, and upholstery seams, and they can survive up to a year without a blood meal. That means a couch sitting in a garage or storage unit for months can still harbor live bugs. After mattresses and box springs, stuffed sofas and chairs are the most common hiding spots.
If you’re buying used furniture, remove all cushions and inspect them carefully along decorative edges and seams. Turn the piece over and check the underside for live bugs, shed skins, or small dark spots (their droppings look like dots from a felt-tip marker). Bed frames, nightstands, and even electronics with small crevices can also carry them.
Apartment and Condo Spread
In multi-unit buildings, bed bugs frequently travel between apartments. Research from Purdue University found that bugs often move to the entry door area of an infested apartment and then disperse into neighboring units through shared hallways. In field tests, interceptor traps placed in hallways captured bed bugs within a single week, confirming that corridors serve as a route from one unit to the next.
Other common paths in apartment buildings include infested wheelchairs or furniture used in common areas, visits between neighbors, and improperly discarded furniture. If someone drags an infested mattress through a hallway without wrapping it in plastic, bugs can drop off along the way and find their way into other units. You can get bed bugs in your apartment without ever traveling or buying used furniture, simply because a neighbor has them.
Public Spaces Carry Low but Real Risk
Movie theaters, public transit, and libraries occasionally make headlines for bed bug sightings, but the actual risk is small. A 2013 pest control industry survey found that only 10 percent of respondents had treated movie theaters for bed bugs in the previous year. Libraries were similar at 12 percent. Public transit (buses, trains, cabs combined) was slightly higher at 23 percent, though those cases mostly involved employee areas rather than passenger seats.
The scenario to watch for is any public space with soft, upholstered seating where people sit for extended periods. Office buildings, waiting rooms, and dorm common areas fall into this category. The risk from a single bus ride is extremely low, but sitting for two hours on an infested theater seat gives a bug time to crawl onto a bag or coat.
How Bed Bugs Find You at Night
Once bed bugs are inside your home, they locate you using two cues: the carbon dioxide you exhale and your body heat. Their detection range is surprisingly short, only about three feet for carbon dioxide and even less for heat. This is why they tend to hide within a few feet of where you sleep, tucked into mattress seams, bed frame joints, and headboard crevices. They aren’t tracking you across the house. They settle close to their food source and wait.
Cleanliness Has Nothing to Do With It
One of the most persistent misconceptions is that bed bugs are attracted to dirty homes. They aren’t. Bed bugs feed exclusively on blood, so crumbs, trash, and unwashed dishes don’t interest them. A spotless apartment is just as hospitable as a cluttered one, as long as there’s a sleeping human nearby. Clutter can give them more places to hide, which makes an infestation harder to treat, but it doesn’t cause the infestation in the first place.
Signs You’ve Brought Them Home
Early detection makes treatment far easier. The EPA recommends looking for these physical signs when changing bedding or returning from a trip:
- Rusty or reddish stains on sheets or mattresses, caused by bugs being crushed during sleep
- Small dark spots about the size of a period, which are bed bug droppings that may bleed into fabric like ink
- Tiny pale yellow shells and eggs (about 1 mm long) shed by young bugs as they grow
- Live bugs in mattress seams, box spring folds, or headboard joints
Check these areas after any hotel stay, after bringing home used furniture, or if you notice unexplained bites that appear in lines or clusters on exposed skin. Catching a few bugs early is a completely different problem than discovering a months-old infestation spread throughout your bedroom.
Why They’re So Hard to Eliminate
Many bed bug populations have developed resistance to the most commonly used insecticides, particularly pyrethrins and pyrethroids. When exposed to these chemicals, resistant bugs may simply move to a new hiding spot rather than die. Pest control professionals now rotate between different chemical classes to reduce resistance, and some use desiccants (powders that destroy the bugs’ outer coating and dehydrate them). Because desiccants work through a physical mechanism rather than a chemical one, bed bugs cannot develop resistance to them.
This resistance is a major reason bed bugs have resurged globally over the past two decades. A bug that survives treatment can reproduce and pass its resistance to the next generation, making each successive infestation in a building harder to control. Professional treatment, often requiring multiple visits, is the standard approach for confirmed infestations.