Can you see bed bugs with the naked eye?

An adult is visible without magnification, roughly the size of an apple seed and reddish-brown. Eggs and newly hatched nymphs are much harder to see, which is one reason a single inspection pass can miss a light infestation and why monitors are used.

Do bed bug bites always itch?

No, and reactions vary enormously between people in the same bed. Someone can share a mattress with an infestation and show nothing at all, which is exactly why the answer to this question is the mattress seam and not the skin.

How do I know if I have bed bugs?

The short answer

Look for the evidence rather than the bites: small dark ink-dot staining along mattress seams and in the bed frame joints, shed skins, and live insects about the size and colour of an apple seed. Bites alone are not diagnostic, because several other things cause similar marks and people react very differently.

Where to look, in order

The mattress seams and the piping, especially at the head end. Use a flashlight held at a low angle.
The box spring, underneath, and the frame joints. More bed bugs live in the frame than in the mattress.
The headboard, including behind it where it meets the wall.
Within a few feet of the bed: the nightstand joints, the edge of the carpet, the baseboard, and the seam of an upholstered chair if there is one in the room.

Capture one if you can

Seal a specimen in a clear bag or a jar with a little tape. Identification is the single most valuable thing you can hand a technician, because the treatment is expensive and disruptive enough that nobody should start it on a guess. Carpet beetles, bat bugs, spider beetles and booklice are all mistaken for bed bugs, and the treatments differ.

Do not start moving mattresses, bedding or furniture into other rooms. It is the single most effective way to turn one infested room into a whole house, and it is the mistake technicians see most often.

What is commonly mistaken for bed bugs

Carpet beetle larvae, which are small, bristly and cause skin irritation in some people.
Fleas, which jump and bite mostly around the ankles.
Bat bugs, which look extremely similar and mean there are bats, not bed bugs, and a different job entirely.
Skin reactions with no insect involved at all, which is why the physical evidence matters more than the marks.

Also asked

Can you see bed bugs with the naked eye?: An adult is visible without magnification, roughly the size of an apple seed and reddish-brown. Eggs and newly hatched nymphs are much harder to see, which is one reason a single inspection pass can miss a light infestation and why monitors are used.
Do bed bug bites always itch?: No, and reactions vary enormously between people in the same bed. Someone can share a mattress with an infestation and show nothing at all, which is exactly why the answer to this question is the mattress seam and not the skin.

Companies whose reviewers name bed bugs

697 pest control businesses in the United States and Canada have reviewers who write about bed bugs. Every listing shows the full rating distribution rather than the average, the share that is one or two star, and whether the owner replies.

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