Do carpet beetles bite?
No. Their larval hairs can irritate skin and cause a rash that looks like bites, but they don't feed on people.
Is it bed bugs or carpet beetles?
Reviewed by William "Willy" Vizcarrondo, NYS DEC Certified Commercial Pesticide Applicator C1825832. Updated September 23, 2026.
Short answer
Look at the bug and the bed, not the bites. Bed bugs are flat, oval, reddish brown, about the width of a credit card, and leave rusty stains, pen-dot black droppings, and shed skins in mattress seams and the bed frame (EPA). Carpet beetle larvae are small, fuzzy, hair-covered, and reddish or light brown, and they're found in closets, under furniture, and in lint, not in bed seams (Colorado State).
Bed bugs
The EPA's checklist: rusty or reddish stains on sheets or the mattress from crushed bugs, dark spots the size of a pen dot which are droppings, tiny pale eggs and yellowish shed skins about 1 mm, and live bugs in the mattress piping, box spring seams, bed frame cracks, and headboard. Bed bugs travel 5 to 20 feet from their hiding spots to feed at night and stay close to where people sleep (EPA).
Carpet beetles
Adults are small oval beetles 2 to 5 mm long, dark or patterned with scales, and often show up at windows in spring. The larvae are the ones people find in closets and along baseboards: elongated, fuzzy, covered in hairs, sometimes with tufts or a tail of bristles, reddish to light brown (Colorado State). They eat wool, fur, feathers, pet hair, lint, and dead insects, and they collect behind walls and in attics where dead insects pile up (Colorado State). Some people react to the larval hairs with an itchy rash that gets mistaken for bites.
Why the mix-up matters
The two problems have opposite fixes. Carpet beetles are a cleanout, vacuuming, and storage problem: freeze or heat-treat infested items, vacuum lint and pet hair, store wool in sealed containers (Colorado State). Bed bugs are a fast-moving problem where every week of delay makes treatment harder and more expensive (EPA). Getting it wrong in either direction wastes time.
On Long Island
We see carpet beetles most in older homes with wool rugs and attics full of dead cluster flies and stink bugs, which feed the larvae. Bed bugs come home from travel, college move-ins, and used furniture. If you're not sure, bag one and call; we'll tell you which it is.
Related
Related questions
Where do bed bugs hide?
Mattress seams and piping, box spring seams and tags, bed frame cracks, headboards, and in heavier cases nightstands, outlet covers, and couch seams.
What do carpet beetle larvae eat?
Wool, fur, feathers, pet hair, lint, and dead insects. Attics and wall voids full of dead fall invaders are a common food source.
Sources
Still not sure? Call (516) 509-6001 and we'll tell you what you're dealing with.