Preventing bed bugs comes down to three things: not bringing them home, making your bed harder to infest, and catching any stragglers before they multiply. Bed bugs don’t come from dirt or poor hygiene. They’re hitchhikers that travel on luggage, furniture, and clothing, so prevention is mostly about controlling what enters your home and creating physical barriers that stop them from reaching you while you sleep.
Inspect Secondhand Furniture Before Bringing It Inside
Used furniture is one of the most common ways bed bugs enter a home. Before bringing any secondhand item through your door, especially upholstered pieces, inspect it carefully in bright light. You’re looking for live bugs (reddish-brown, flat, about the size of an apple seed), tiny black dots the size of a period (dried excrement), pale yellow eggs or eggshells near seams and crevices, and translucent shed skins that look like empty bug shells. A sweet, musty odor is another red flag.
Bring a flashlight and a credit card or other flat-edged tool. Run it along seams, tufts, under cushions, into drawer joints, and through screw holes. Bed bugs squeeze into incredibly tight spaces, so you need to physically probe crevices rather than just glancing at surfaces. If you see any signs at all, pass on the item. No couch is worth an infestation.
This applies to more than just furniture. Electronics, picture frames, books, and anything stored near a bed in someone else’s home can carry bugs or eggs.
Use Mattress and Box Spring Encasements
Mattress encasements are one of the most effective preventive tools available. They cover the entire mattress and box spring in a sealed fabric shell, eliminating the seams, folds, and crevices where bed bugs prefer to hide. Without those hiding spots, bugs have nowhere to establish themselves on your bed.
Not all encasements work equally well. For bed bug protection, the fabric must be bite-proof so bugs can’t feed through it. The zipper needs very small, tightly spaced teeth that prevent even immature bugs from squeezing between them, and it must seal completely at the end-stop with no gap. Any opening, tear, or loose seam defeats the purpose. Check encasements periodically for damage and replace them if you find any.
Install Interceptor Traps Under Bed Legs
Interceptor traps are small plastic dishes that sit under the legs of your bed and upholstered furniture. They work by exploiting two bed bug behaviors: bugs actively search for a sleeping host, and they climb vertical surfaces to reach one. The trap’s smooth inner walls prevent bugs from climbing out once they fall in, catching them before they ever reach your mattress.
For interceptors to work, your bed needs to be an island. Pull it a few inches from the wall and make sure no blankets, bed skirts, or pillows drape to the floor, since any contact between the bed and another surface creates a bridge that bypasses the trap. Interceptors don’t contain attractants, so they rely on bugs naturally traveling toward you. Leave them in place for at least a week or longer to detect low-level activity. Check them regularly with a flashlight. Even one bug in a trap is a signal to act immediately.
Protect Yourself During Travel
Hotels and short-term rentals are prime pickup spots for bed bugs. When you arrive, set your luggage in the bathroom (on tile or in the bathtub) before doing anything else. Then inspect the bed. Pull back the sheets and check the mattress seams, the headboard, and the bed frame joints using your phone’s flashlight. Look for the same signs you’d check on used furniture: black fecal spots, shed skins, eggs, and live bugs. Check the luggage rack and any upholstered chairs, too.
Keep your suitcase off the bed and the floor for your entire stay. Use the luggage rack (after inspecting it) or keep bags on a hard, non-carpeted surface. Store dirty clothes in sealed plastic bags rather than tossing them on the floor or into open drawers.
Unpacking After a Trip
When you get home, don’t bring your suitcase to the bedroom. Unpack on a hard surface in a garage, laundry room, or entryway under bright light so you can spot any bugs that hitched a ride. Put all clothing directly into sealed plastic bags to contain anything that might be hiding in the fabric. From there, move everything straight to the dryer.
A household dryer set on high heat kills all bed bug life stages, including eggs, in 30 minutes. The key is a loosely filled load so heat circulates evenly. This works even if the clothes are clean and dry; it’s the heat, not the washing, that does the killing. Bed bugs die within 20 minutes at 118°F, but their eggs are tougher and need a full 90 minutes at that same temperature to reach complete mortality. A dryer on high easily exceeds these thresholds.
After emptying the suitcase, inspect it with a flashlight, paying close attention to seams, folds, and pockets. Vacuum it thoroughly using a brush and crevice tool, then seal the vacuum contents in a plastic bag with tape and throw it away. Wash the suitcase’s exterior with hot, soapy water.
Seal Entry Points in Apartments
If you live in a multi-unit building, bed bugs can migrate from neighboring units through cracks in shared walls and ceilings. Caulk and seal as many cracks and crevices as you can, especially around baseboards, electrical outlets, and pipe entries. This won’t create an airtight seal against every possible bug, but it reduces the easy pathways they use to travel between rooms.
Apartment living also means your prevention depends partly on your neighbors. If your building has a history of infestations, interceptor traps and mattress encasements become especially important as an early warning system and physical barrier.
Know the Early Signs
Prevention works best when paired with early detection. Bed bug populations grow fast, and catching them in the first week or two makes elimination dramatically easier than discovering a full-blown infestation months later.
The earliest visible evidence is usually fecal spots: small black dots that appear in clusters of ten or more on mattress surfaces, bed frames, and nearby baseboards. They feel smooth to the touch because they’re dried digested blood. At low numbers, you might see just one or two spots in a given area. Shed skins, which are translucent and shaped exactly like the bugs themselves, accumulate near hiding spots over time. Eggs are pearl-white, about the size of a pinhead, and develop visible dark eyespots after five days.
The bugs themselves are harder to spot in early infestations. Immature bed bugs are tiny and nearly invisible unless they’ve recently fed, which turns them bright red. Adults are easier to see, roughly the size of an apple seed, flat, wingless, and reddish-brown. After feeding, they swell into an elongated torpedo shape.
Make it a habit to check your mattress seams and headboard joints every few weeks, especially after travel or if you’ve brought new items into the home. A flashlight and a few minutes of attention are the cheapest prevention tools that exist.
What Doesn’t Work
There is no EPA-registered repellent proven to keep bed bugs off you or your belongings. DEET and similar products are designed for mosquitoes and ticks, not bed bugs. Essential oils like lavender, tea tree, and peppermint are widely marketed as bed bug deterrents, but their effectiveness hasn’t been established through rigorous testing, and many aren’t even required to be registered with the EPA. Permethrin, which is sometimes applied to clothing to kill ticks on contact, is not a repellent and should never be applied to skin.
Ultrasonic devices, dryer sheets tucked under mattresses, and double-sided tape around bed legs are similarly unproven. Stick with physical barriers (encasements and interceptors), heat treatment for belongings, and regular inspections. These methods target actual bed bug behavior rather than relying on substances that bugs can simply walk past.