Bed bugs don’t come from dirt, filth, or poor hygiene. They come from other people. More specifically, they hitchhike on luggage, clothing, furniture, and bags, spreading from one location to the next wherever humans sleep. Understanding how they travel is the key to keeping them out of your home.
How Bed Bugs Get Into Your Home
Bed bugs reach new locations in three main ways: they ride along on items you carry, they crawl in from neighboring units, or they arrive hidden inside secondhand furniture. They can’t fly or jump. Every infestation starts with a bug (or its eggs) physically being transported from one place to another.
The most common route is travel. Hotels, hostels, and short-term rentals see constant turnover of guests, and a single infested traveler can seed bugs into a mattress that then spreads to the next visitor’s suitcase. Your luggage sits on or near the bed, a bug crawls in, and you carry it home without knowing. Purses, backpacks, and coats placed on upholstered surfaces pick them up just as easily.
In apartment buildings, dorms, and row houses, bed bugs walk between units through cracks in floorboards, along plumbing pipes, and through gaps around electrical wires. You can do everything right and still get an infestation because a neighbor three doors down has one. This is why sealing cracks along baseboards, tightening outlet covers, and caulking where pipes enter your walls actually matters in shared buildings.
Why Cleanliness Has Nothing to Do With It
Bed bugs are blood feeders. They don’t eat crumbs, garbage, or grime. A spotless penthouse apartment is just as attractive to them as a cluttered studio, because the only thing they need is a sleeping human. Financial status, housekeeping habits, and neighborhood have no bearing on whether bed bugs show up. The difference is simply whether someone or something carried them in.
Clutter can make an infestation harder to detect and treat, since it gives bugs more places to hide. But clutter doesn’t cause the infestation. This distinction matters because the stigma around bed bugs often stops people from reporting them early, which lets the problem grow.
How Long They Survive in Hiding
Part of what makes bed bugs so effective at spreading is their patience. Adults typically feed every five to seven days, but they can survive without a blood meal for months. Under cool, low-humidity conditions, adults have survived over 400 days without feeding in laboratory settings. Even at normal room temperatures, they can go 20 days or more between meals. Older nymphs survive longer than younger ones.
This means a bed bug hiding in a piece of furniture in a storage unit, a vacant apartment, or a suitcase in your closet can stay alive long enough to start feeding again when a host returns. You can’t simply leave a room empty and expect the problem to resolve itself in a few weeks.
The Risk of Secondhand Furniture
Used furniture is one of the most common sources of new infestations. Beds, couches, dressers, and upholstered chairs can all harbor bed bugs in seams, cracks, and fabric folds. Purdue University’s entomology department advises against purchasing used beds entirely and warns against picking up furniture left in alleys or along roads.
If you do buy secondhand furniture, inspect it thoroughly before bringing it inside. Check every seam, crack, and crevice. Turn the piece over to examine the underside and back. Pull out drawers and inspect both the drawer and the cavity it sits in. A magnifying glass helps, since eggs are only about a millimeter long and translucent. Look for live bugs, dark fecal spots, reddish-brown stains, and tiny pale eggs.
If you find signs of bed bugs but still want the piece, you’d need to vacuum and steam clean every surface, re-inspect, and ideally wrap it in plastic for transport. Honestly, unless the piece is irreplaceable, it’s rarely worth the risk.
How to Inspect a Hotel Room
Since travel is the number one way bed bugs find new homes, a quick hotel room check is one of the most effective prevention steps you can take. It only takes five to eight minutes.
Start by placing your luggage in the bathroom or on a hard luggage rack, away from the bed and carpeted areas. Keep your coat and bags off the furniture until you’ve done your inspection. Then turn on all the lights and pull back the sheets, blankets, and comforters.
Focus on the head of the bed first, since that’s where most bed bugs concentrate. Run a credit card or key card along the mattress seams, tags, corners, and piping to dislodge anything hiding in tight spaces. Lift the mattress and check the box spring seams and corners. Use your phone’s flashlight. You’re looking for dark spots (fecal stains), reddish smears, tiny eggs, shed skins, or live bugs.
Next, check furniture within eight feet of the bed. Nightstands, dressers, upholstered chairs, and the headboard are prime hiding spots, especially joints, screw holes, and where furniture meets the wall. In more severe infestations, bed bugs also hide behind picture frames, along curtain seams, and even inside electrical outlets near the bed.
If you find anything suspicious, request a different room, ideally not adjacent to or directly above or below the original one.
What Kills Them
Heat is the most reliable weapon against bed bugs. They die after 90 minutes of constant exposure to 113°F, or within 20 minutes at 118°F. Eggs are tougher: they need 90 minutes at 118°F to reach full mortality. A household dryer set on high will kill all life stages, including eggs, in about 30 minutes as long as the load is loosely filled.
Professional heat treatments work by raising the temperature of an entire room above 120°F, then holding it there for at least 60 minutes after every sensor in the space reaches the target. This is one of the most effective professional options because heat penetrates into wall voids, mattresses, and furniture where sprays can’t always reach.
For everyday prevention after travel, running your clothes through a hot dryer cycle before putting them away is a simple, effective precaution. Bag your worn travel clothes separately, and dry them on high heat as soon as you get home. Inspect your suitcase in the garage or bathroom rather than your bedroom, and vacuum it out before storing it.
Where They Originally Came From
Bed bugs (Cimex lectularius) have been parasites of humans for thousands of years, likely originating as bat parasites in caves where early humans sheltered. As people moved into permanent dwellings, the bugs adapted to feed on us instead. They were common worldwide until the mid-20th century, when widespread use of potent pesticides nearly eradicated them in developed countries. Their resurgence since the late 1990s is largely attributed to increased international travel, pesticide resistance, and a shift away from the broad-spectrum chemicals that once kept them in check.
Today they’re found on every continent except Antarctica, in cities and rural areas alike, in five-star hotels and budget hostels. The common thread is always the same: they go wherever people go, and they get there by riding along on our belongings.