Bed bugs are the most difficult household pest to eliminate without professional help. They hide in seams and wall voids, survive months without feeding, and their eggs are glued into crevices where sprays can’t reach. This guide covers how to confirm an infestation, which treatment actually works, and how to prevent them from spreading or returning.
If you suspect an active infestation, start with our fast-action guide: How to Get Rid of Bed Bugs Fast.
How to Confirm It’s Bed Bugs
Adult bed bugs are oval, flat, and reddish-brown — about the size of an apple seed. Before feeding they’re flat and pale; after a blood meal they swell and darken. The most reliable signs are dark fecal spots along mattress seams, cast skins, and live bugs in the seams of bedding and furniture. Bites alone are not confirmation — they look like many other insect bites.
For visual identification, see our guide to what bed bugs look like and pictures of bed bugs. If you’re trying to distinguish the bites from other pests, spider bite vs bed bug bite and bed bug bites vs mosquito bites cover the differences.
Why DIY Treatment Usually Fails
Three reasons. First, bed bugs hide in places most people don’t treat — behind outlet plates, inside box springs, in the seams of furniture. Second, eggs hatch 6–10 days after treatment, so a single application leaves a new generation behind. Third, many over-the-counter sprays are repellent, which drives the bugs deeper into harborage areas rather than killing them.
The treatment method matters. Our guide to heat treatment vs chemical treatment explains why professional heat is the most reliable single-visit option, and does steam kill bed bugs covers what steam can and can’t do on its own.
How to Treat a Bed Bug Infestation
The method that works combines heat, targeted residual, and physical barriers. Steam kills all life stages on contact but has no residual effect, so it must be paired with a residual dust or spray in the harborage areas steam can’t reach. Mattress encasements lock surviving bugs away from the bed.
Our DIY bed bug spray guide covers which products actually work and which are a waste of money, and how to kill bed bug eggs explains why the second treatment at day 10–14 is non-negotiable. If you’re treating a single room, our single-room treatment guide is the most efficient starting point.
How to Stop Them Spreading
Bed bugs spread through luggage, clothing, and used furniture. After travel, dry all clothing on high heat before bringing it inside. Inspect hotel rooms before unpacking — pull back the sheets and check the mattress seams. At home, encase mattresses and box springs, seal baseboard cracks, and reduce clutter near sleeping areas.
Our guide to inspecting your home for bed bugs walks through the room-by-room check, and can bed bugs live in carpet answers the most common question about where they hide.
When to Call a Professional
Call a professional if bed bugs have spread beyond one room, if you live in an apartment or multi-unit building, or if DIY treatment has failed after two full rounds. Professional heat treatment typically costs $1,000–$3,000 per home. For cost comparisons, see how much bed bug exterminators cost.
Frequently Asked Questions
Do bed bugs fly or jump?
No. Bed bugs cannot fly or jump — they crawl. See do bed bugs fly.
How long do bed bug bites last?
Bites typically itch and fade over one to two weeks. Some people don’t react at all, which is why bites alone are an unreliable sign of infestation.
Can you see bed bugs?
Adults are visible to the naked eye, but nymphs and eggs are extremely small. See can you see bed bugs.