Earwigs found inside your house are almost always European earwigs that wandered in looking for moisture or shelter. They’re harmless nuisance pests that don’t bite, don’t carry disease, and can’t actually reproduce indoors. The good news: because homes are too dry for their eggs and nymphs to survive, an indoor earwig problem is usually temporary and fixable without professional help.
What House Earwigs Look Like
The species you’re most likely dealing with is the European earwig, a flat, reddish-brown to dark brown insect about half to three-quarters of an inch long. It has segmented, bead-like antennae, short hard wing covers on its back, and the signature pair of pincers (called cerci) at the rear. Males have noticeably curved pincers, while females have straighter, smaller ones. Despite having wings, European earwigs rarely fly.
A second species, the ringlegged earwig, also turns up indoors. It’s slightly smaller (up to about three-fifths of an inch), black on top with a yellowish underside, and completely wingless. Its legs have distinctive white bands at the joints. Both species behave similarly inside homes.
Why Earwigs Come Inside
Earwigs need moisture. Outdoors they live under mulch, rocks, leaf litter, and flower pots where the soil stays damp. They move indoors for a few predictable reasons:
- Dry or extreme weather. When outdoor conditions turn too dry, too hot, or too cold, earwigs migrate toward the nearest damp shelter, which can be your basement, crawl space, or bathroom.
- Light attraction. Porch lights and illuminated windows draw earwigs to the exterior of your home at night, and from there they slip through any available gap.
- Hitchhiking. Earwigs ride inside on potted plants, cardboard boxes stored in garages, bundles of newspapers, firewood, and lumber. A common scenario is bringing in a planter that’s been sitting on a wet saucer outdoors.
Once near the house, they enter through cracks where the foundation meets the siding, gaps around poorly sealed doors and windows, unscreened vents, and utility penetrations for pipes or cables. Wet basement walls that drip onto the floor, cluttered crawl spaces, and leaves that have blown into lower levels all create exactly the damp, sheltered conditions earwigs prefer.
Are House Earwigs Dangerous?
No. Earwigs don’t bite people, don’t spread disease, and their pincers contain no venom. If you pick one up, it might pinch you in self-defense, and the pinch can sting briefly, but that’s the extent of it. The old myth that earwigs crawl into human ears has no basis in reality.
Earwigs also don’t damage your home’s structure. They won’t chew wood, fabric, or wiring. Indoors they’re purely a nuisance, and they eventually die on their own because there’s almost nothing for them to eat inside a typical house.
Can Earwigs Breed in Your Home?
They can’t sustain a population indoors. In spring, females normally lay 30 to 55 eggs in moist soil and guard them until the nymphs hatch, a rare example of maternal care in insects. The young go through four to five stages before reaching adulthood. But eggs and nymphs can’t tolerate the low humidity inside a home, so even if a pregnant female gets inside, her offspring won’t survive. Every earwig you find in the house came from outdoors.
What They Eat (and Don’t Eat) Indoors
Outside, European earwigs are opportunistic feeders. They eat aphids, insect eggs, mites, decaying organic matter, seedlings, soft fruits like strawberries and apricots, flower petals, and corn silks. They’re actually useful garden predators under certain conditions, providing real biological control of aphids and other soft-bodied pests.
Inside your house, though, there’s almost nothing on their menu. They might nibble on a houseplant leaf or a crumb, but they won’t find enough food to sustain themselves for long. This is why indoor earwigs are a self-limiting problem.
How to Get Earwigs Out of Your House
Since earwigs can’t breed indoors, the immediate fix is simple: vacuum or sweep up the ones you see and dispose of them. For a larger number, a damp rolled-up newspaper left on the floor overnight works as a trap. Earwigs will crawl inside seeking moisture, and you can bag and discard the whole thing in the morning.
Diatomaceous earth, a powder made from fossilized algae, can be sprinkled in cracks, along baseboards, and around entry points. It works by damaging the waxy coating on an insect’s body, causing it to dehydrate. It’s safe around people and pets but becomes ineffective when wet, so it’s best for dry indoor areas. For outdoor use around garden plants, reapply after rain or watering.
Oil traps work well outside near the foundation. Take a small container (an old yogurt or cottage cheese tub), pour a shallow layer of fish oil or bacon grease in the bottom, cut a small hole in the lid, and bury it in the ground up to the rim. Check it every few days and dump out the catch. Rolled corrugated cardboard rubbed with the same oils and tied to tree trunks or placed near garden beds catches earwigs looking for daytime shelter.
Keeping Earwigs from Coming Back
Long-term prevention is about cutting off moisture and sealing entry points. These changes make the biggest difference:
- Reduce moisture near the foundation. Water your garden in the morning so soil dries before nightfall, when earwigs are active. Fix leaky outdoor spigots and hose connections promptly. Clean gutters twice a year and redirect downspout discharge at least three feet from the house.
- Create a dry perimeter. Pull mulch back a few inches from siding so a strip of bare, dry soil separates landscaping from the house. Move firewood and lumber stacks at least 20 feet away and store them off the ground on a rack.
- Seal the building envelope. Caulk gaps around window frames, door frames, and pipe or cable penetrations. Replace torn window screens and worn door sweeps that no longer sit flush against the threshold. Seal foundation cracks with masonry caulk or hydraulic cement. Cover attic and foundation vents with fine mesh screening if factory louvers have gaps.
- Control indoor humidity. Check basements and crawl spaces for condensation. Run a dehumidifier if humidity stays above 50 percent.
- Manage outdoor lighting. Switch porch and entry lights to yellow “bug” bulbs or motion-activated fixtures. Angle exterior lights away from doors and windows so the glow doesn’t hit the siding earwigs use as a pathway.
Inspect potted plants, especially between the pot and saucer, before bringing them indoors. Do the same with boxes that have been stored in garages or sheds. These simple checks prevent the most common hitchhiking route into your living space.
When Chemical Treatments Make Sense
Most house earwig situations don’t require pesticides. But if you’re seeing large numbers consistently, a perimeter spray around the foundation can help. Products containing pyrethrins (derived from chrysanthemum flowers) or spinosad (derived from a soil bacterium) are lower-risk options that are effective against earwigs while being less harmful to beneficial insects. Broader-spectrum products like permethrin work but can also kill natural predators of earwigs and other garden pests, so they’re worth using selectively rather than as a first resort.