Are Centipedes and Millipedes in My Home Something to Worry About?

What’s the difference between centipedes and millipedes?

They look similar but behave very differently. Centipedes have one pair of legs per body segment, move fast, and are predators that hunt other small insects. Millipedes have two pairs of legs per segment, move slowly, feed on decaying plant matter, and tend to curl into a tight coil when disturbed. Both are more closely related to one another than to insects, and both turn up in North Florida homes as occasional invaders rather than true indoor pests. The University of Florida covers them directly in its guide to pillbugs, centipedes, millipedes, and earwigs.

Are centipedes dangerous?

Centipedes look alarming and can deliver a venomous pinch with their front appendages if handled, which for the common house species feels roughly like a bee sting and is rarely a serious medical issue for most people. They are not aggressive and would rather flee than confront you. The larger the centipede, the more noticeable the pinch can be, so it is wise not to handle them barehanded — but in general they pose little real danger. Anyone with known venom sensitivities should be cautious, and any unusual reaction warrants medical attention. This is general information, not medical advice.

Are millipedes dangerous?

Millipedes are even less of a concern. They do not bite or sting. Their main defense is to coil up and, in some species, secrete a fluid with a faintly unpleasant smell that can irritate skin or stain if you handle them, so it is best to sweep or vacuum them up rather than pick them up. They do not damage the home or its contents. Their biggest nuisance is simply showing up in numbers — millipedes sometimes migrate in large groups, especially after heavy rain or as conditions change, ending up in garages, lanais, and entryways. The upside is that this is a temporary, weather-driven event rather than an indoor infestation, and the millipedes that wander in generally die off quickly without the damp soil they depend on.

Why are they in your home?

Both centipedes and millipedes are moisture-loving and live outdoors in damp places — under mulch, leaf litter, logs, stones, and in the soil. They come indoors when conditions outside get too wet or too dry, or simply by wandering through a gap, and they tend to end up in the dampest, lowest areas: garages, bathrooms, crawl spaces, and along the foundation. Because they need humidity, they usually don’t survive long indoors, which is why you often find them already dead or dying. Seeing them is frequently a sign of excess moisture or harborage right around the home’s perimeter.

How do you get rid of them?

Because they are perimeter-driven invaders, control focuses on the outside conditions and the building envelope rather than indoor spraying. For the few that get in, sweeping or vacuuming is the simplest removal. Lasting control means drying out the perimeter, removing the damp harborage they live in, and sealing the gaps they use to enter, often paired with an exterior treatment. Paul’s handles centipedes, millipedes, and other occasional invaders through recurring general pest control that maintains a perimeter barrier, and a free quote will fit the plan to your home.

How do you keep them out?

Prevention is mostly moisture and exclusion — the same steps that help with many other occasional invaders. A few targeted moves make your home far less inviting.

• Move mulch, leaf litter, logs, and stones away from the foundation, and keep that zone drier.
• Improve drainage and fix damp spots around the perimeter, crawl space, and garage.
• Seal gaps around doors, garage thresholds, pipes, and the foundation line, and repair worn weatherstripping.
• Reduce indoor humidity in bathrooms, laundry rooms, and basements with ventilation or a dehumidifier.

When should you call a professional?

An occasional centipede or millipede is normal in humid North Florida and nothing to worry about. But if you are seeing them regularly, dealing with a millipede migration into the garage or lanai, or finding them throughout the home, professional help addresses the perimeter conditions and entry points driving the problem. A technician can treat the exterior, advise on moisture and harborage, and set up recurring service so the invaders stay outside where they belong.

Why do you see them more after rain or weather changes?

If centipedes and millipedes seem to show up in waves, weather is usually the reason. Both live in the moist soil and leaf litter around a home, and when conditions shift sharply — heavy rain that floods their habitat, or a hot dry spell that bakes it — they move in search of better moisture, and that movement often brings them up against the foundation and through any available gap. Millipedes in particular are known for mass movements, sometimes appearing by the dozens along a garage door or lanai after a big rain. This is why the problem tends to be seasonal and episodic rather than constant: it tracks the weather and the moisture around your property. It also explains why indoor sprays are the wrong tool — the source is the perimeter, not the living room. The durable answer is to make that perimeter less hospitable: keep the foundation zone drier and clear of mulch and debris, improve drainage so water doesn’t pool against the house, and seal the entry points they exploit. With those conditions addressed and an exterior barrier in place, the weather-driven surges that push them indoors have far less effect, and the occasional invader that does get in is easy to sweep up.

Frequently Asked Questions

Do centipedes bite?

Centipedes can deliver a venomous pinch if handled, which for common house species feels about like a bee sting and is rarely serious. They’re not aggressive — don’t handle them barehanded.

Are millipedes harmful?

No. Millipedes don’t bite or sting. Some secrete a mildly irritating fluid if handled, so sweep or vacuum them rather than picking them up.

Why do I suddenly have a lot of millipedes?

Millipedes sometimes migrate in groups, often after heavy rain or changing conditions, and end up in garages and entryways. It’s usually temporary and tied to outdoor moisture.

How do I keep them out?

Reduce moisture and harborage around the foundation, seal entry gaps, and consider an exterior perimeter treatment. They need humidity, so a drier perimeter is the best defense.

Do you serve my area?

Yes — Paul’s serves the Tallahassee and Jacksonville / Orange Park metros. For a free quote, call Tallahassee: 850-222-6808 / Jacksonville & Orange Park: 904-567-8307.

Key takeaways

• Centipedes can pinch (rarely serious) and are fast predators; millipedes don’t bite, curl up, and may secrete a mild irritant.
• Both are moisture-loving outdoor arthropods that wander in and rarely survive long indoors.
• Control the perimeter — moisture, harborage, and entry gaps — to keep both out; call 850-222-6808 for recurring protection.