Bed bugs spread almost entirely by hitchhiking on people’s belongings. They don’t jump or fly. Instead, they crawl into luggage, clothing, furniture, and bags, then ride along to a new location where they settle near a sleeping host and begin reproducing. A single fertilized female can lay up to 5 eggs per day and roughly 500 in her lifetime, which means one unnoticed hitchhiker can seed an entire infestation within weeks.
Hitchhiking on Belongings
The most common way bed bugs reach a new home is by stowing away in something you carry. They’re flat, roughly the size of an apple seed, and can tuck themselves into seams, folds, and zippers where they’re nearly invisible. Suitcases are the classic vehicle: you set your bag on a hotel bed or luggage rack near an infested area, and a few bugs crawl in overnight. But luggage isn’t the only risk. Backpacks, purses, laptop bags, and even shoes can carry them.
Secondhand furniture is another major route. Mattresses, box springs, couches, and upholstered chairs left on curbs or sold through online marketplaces may look clean but harbor bugs deep in seams, staple points, or wooden joints. Bed frames, nightstands, and dressers with cracks or crevices are also common hiding spots. If a piece of furniture was near someone’s sleeping area, it’s worth inspecting thoroughly before bringing it inside.
How They Move Between Apartments
In multi-unit buildings, bed bugs don’t need anyone to carry them. They crawl. Adults and older nymphs can travel through wall voids, electrical conduits, plumbing chases, and gaps around baseboards to reach adjacent units. Shared ceilings, floors, and hallways all serve as pathways. This makes apartments, dormitories, and condominiums especially difficult environments, because an infestation in one unit can quietly migrate to neighbors on either side, above, or below.
Sealing gaps around pipes, electrical outlets, and baseboards can slow this movement, but bed bugs are small enough to exploit cracks you might not notice. In buildings with high tenant turnover, the cycle of new occupants moving in and out creates constant opportunities for bugs to spread through shared laundry rooms, hallways, and storage areas.
Where Exposure Happens Most
Hotels are the location most people associate with bed bugs, and for good reason. Constant guest turnover means new bugs can arrive nightly, and a single infested room can seed others through housekeeping carts, shared walls, or guests moving to a different room. But hotels are far from the only risk. Infestations are common in shelters, nursing homes, hospitals, schools, libraries, theaters, offices, and on public transportation. Anywhere people sit or rest for extended periods, bed bugs can transfer from one person’s belongings to another’s.
You don’t need to sleep somewhere to pick them up. Sitting in an infested movie theater seat, leaning a bag against a couch in a waiting room, or storing a coat in an office closet next to someone else’s infested jacket can be enough. The bugs are opportunistic, not picky. They go where warmth and carbon dioxide lead them, and they’ll settle into any dark crevice until their next meal.
Why Infestations Grow So Fast
Bed bugs reproduce quickly and survive a remarkably long time without feeding. A female lays up to 5 eggs daily, and at room temperature, nymphs hatch within 5 to 10 days. Each nymph needs a blood meal to molt to the next stage, but older nymphs and adults are patient. Under normal household conditions, bed bugs can survive 20 to 400 days without a meal, depending on temperature and humidity. In laboratory conditions at low temperatures, adults have survived more than 400 days without feeding.
This resilience is what makes them so hard to eliminate and so easy to spread. A few bugs hiding in a piece of furniture can survive months in a storage unit, a moving truck, or an empty apartment before someone moves in and unknowingly provides them with a host. By the time you notice bites or spot the telltale dark fecal stains on your sheets, the population may already number in the dozens or hundreds.
Reducing Your Risk
Since bed bugs spread passively, prevention comes down to limiting what they can ride on and killing any that do make it onto your belongings. When traveling, keep luggage off the bed and away from upholstered furniture. Inspect the mattress seams, headboard, and nightstand in any hotel room before settling in. When you get home, wash all your clothes, whether you wore them or not, in hot soapy water and dry them on high heat. Bed bugs at all life stages, including eggs, cannot survive that combination.
For non-washable items like shoes, bags, or electronics, sealing them in a plastic bag and placing them in a freezer at 32°F or below for several days will also kill bed bugs. Portable heating units designed for this purpose are another option for treating luggage and larger items.
If you’re buying or accepting used furniture, inspect every seam, joint, crack, and fold before it enters your home. Pay special attention to mattresses, box springs, and anything with fabric or cushioning. In apartment buildings, keeping baseboards sealed and outlet covers tight won’t guarantee protection, but it removes the easiest travel routes between units.