House Centipede Bite: Symptoms, Danger & Treatment (2026)
A house centipede bite feels like a quick, sharp pinch, similar to a bee sting, and it is almost always over faster than the panic it causes. Genuine bites are rare because the animal's own fangs are often too small to break skin, and even when they do, the venom is built for insects, not people. The real question isn't whether it's dangerous — it almost never is — it's whether what you're looking at is actually a centipede bite at all.
What the house centipede bite looks like
The pain arrives first, and it arrives fast — a sharp, localized pinch at the moment of contact that many people compare directly to a bee sting rather than a typical bug bite. There's rarely any delay: if a house centipede's forcipules manage to break the skin, you feel it immediately, not hours later.
What's left behind is usually modest: a small red, mildly swollen spot, sometimes with two faint puncture points positioned close together in a subtle V-shape from the animal's paired forcipules. The mark is often no larger than a coin and rarely spreads beyond the immediate contact point.
A visible double-puncture pattern is the textbook description, but it's far from guaranteed. Because house centipedes are small and their front legs often aren't strong enough to fully pierce human skin, a large share of "bite attempts" leave no mark at all, or just a faint pink pinch point that fades within an hour.
Because the mark is small and nonspecific, it's commonly mistaken for a mosquito bite, an ant sting, or a minor spider bite — especially if you didn't see the centipede at the moment it happened. If you're piecing this together after the fact with no visual confirmation, the appearance alone usually isn't enough to be certain.
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Symptom timeline
Hours 0–2. The bite itself registers as a sharp, brief pinch. Redness and mild swelling typically appear within minutes at the puncture site, similar to the onset pattern of a bee sting.
Hours 2–8. Swelling and redness often reach their peak in this window. Mild itching or tenderness around the site is common, but the area usually stays confined and doesn't spread outward.
Day 1–2. Most people see clear improvement by now — redness fading, swelling going down, pain largely gone. Symptoms in the majority of cases resolve within roughly 48 hours.
Day 3–7. By this point the site should be nearly or fully healed for an uncomplicated bite. If the area is still worsening, feels warm, develops red streaks, or you're running a fever, that's no longer a typical centipede bite pattern and it's time to get it evaluated rather than wait it out further.
Curious how far along your symptoms actually are?
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The vast majority of house centipede bites are a non-event medically: mild pain, small local swelling, and full resolution within a day or two without any treatment beyond basic wound care. For a closer look at the animal responsible, the illustrated house centipede species profile from Insectio covers why its venom is potent against insects but weak against human tissue.
The minority-serious-outcome scenario is an allergic reaction, and even that is uncommon. Severe systemic reactions, including anaphylaxis, have not been widely reported with house centipedes specifically, and documented fatalities from their bites do not exist in the medical literature. That doesn't mean zero risk — any insect-venom exposure can theoretically trigger a reaction in someone who's already sensitized — it means the baseline risk sits at the low end of the bite spectrum.
People with known insect-venom allergies, young children, and anyone who's had a strong reaction to a bite or sting before should treat any new bite with a bit more caution and watch more closely for swelling that spreads beyond the local area, especially around the face or throat.
Bottom line: monitor the site for the first 24–48 hours. If it's improving, you're almost certainly dealing with a routine bite. If it's still spreading, hurting more, or you develop a fever or breathing trouble, escalate to medical care rather than continuing to wait.
Bite Symptom Checker
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If you want a second opinion on what actually bit you before assuming the worst, a free bug id comparison can help rule other common house pests in or out.
Treatment
Wash and elevate. Clean the puncture site with mild soap and lukewarm water — skip the alcohol, since this is a puncture wound, not a cut. Elevating the limb slightly can help limit swelling if it develops.
Cool, don't heat. Wrap ice or a cold pack in a cloth and apply it for about 10 minutes on, 10 minutes off. Cold slows swelling and raises the pain threshold; heat would only aggravate the local reaction.
OTC support. An oral antihistamine can help with itching, and a standard over-the-counter pain reliever handles residual soreness. A topical antibiotic ointment and a light bandage can help prevent infection at the puncture site.
Watch, don't wrap. Keep the area visible enough to monitor rather than tightly bandaged. Track the size of the redness. If you're running a fever of 100.4°F or higher, see red streaks spreading from the site, or notice the reaction still worsening past 48 hours, escalate to a doctor.
Prevention
House centipedes bite defensively, almost never on their own initiative, so most future bites are avoided simply by not grabbing or trapping one against skin — use a cup or tissue rather than bare hands if you need to move one. They're drawn indoors by moisture and other small insects to prey on, so drying out damp basements, bathrooms, and crawl spaces removes both the food source and the humidity they need.
If you keep encountering them and want to confirm what you're actually seeing before treating for the wrong pest, you can use the BugKnow app to identify a house centipede from a quick phone photo rather than guessing from memory. If you've spotted more than one in your home regularly, a full inspection for moisture and secondary pest issues is worth the effort.
Wondering whether this warrants an actual doctor visit?
Walk Through the Decision TreeShould You See a Doctor?
A short decision tree based on CDC and Mayo Clinic guidance.
1 / 3 Are you having difficulty breathing, or swelling of your lips, tongue, or throat?
2 / 3 Do you have a fever of 100.4°F or higher, or red streaks spreading from the bite?
3 / 3 Has the redness or swelling been getting steadily worse for more than 48 hours?
Frequently asked questions
Can a house centipede bite kill you?
No documented fatalities from house centipede bites exist. Their venom is built to subdue small insects, not humans, and most bites cause only mild, short-lived pain and swelling. Severe allergic reactions are possible but extremely rare, similar in likelihood to a reaction from a bee sting. If you develop trouble breathing or facial swelling, treat it as a medical emergency regardless of the cause.
How long until I know if a house centipede bite is serious?
Most uncomplicated bites peak within the first 8 hours and noticeably improve within 48 hours. If pain, redness, or swelling is still getting worse after two days, or if you develop a fever, that is your signal it may not be a simple bite and you should get it checked rather than keep waiting it out.
How do I tell a house centipede bite from a spider bite?
A house centipede bite typically shows two small puncture marks close together, sometimes in a faint V-shape, with mild swelling that fades quickly. Spider bites, especially from more venomous species, tend to cause stronger swelling, blistering, or delayed pain. Location matters too: centipede bites usually happen on hands or feet during direct contact, while spider bites can occur anywhere skin brushed a web or hiding spot.
What does a house centipede bite look like?
It usually looks like a small red, slightly swollen spot with two faint puncture points, often compared to a mosquito bite or minor ant sting. Because house centipede forcipules are small, many bites barely mark the skin at all. For a closer clinical look at wound care and healing timelines, the NIH's overview of centipede envenomation treatment is a useful reference.
Do house centipede bites hurt?
Yes, the initial bite is often described as a sharp pinch similar to a bee sting, since the venom is delivered through modified front legs called forcipules. The pain is usually brief and localized, and it fades faster than the pain from a bee or wasp sting for most people. Larger centipedes tend to deliver more noticeable pain than smaller ones.
Are house centipedes poisonous or venomous?
House centipedes are venomous, not poisonous. Venomous means they can inject venom through a bite, which is how they subdue insect prey. Poisonous would mean they're harmful if touched or eaten, which they are not. Their venom is potent against small insects but weak and rarely medically significant when it reaches human skin.
Why did a house centipede bite me?
House centipedes are shy and actively avoid humans, so bites almost always happen defensively, usually when one is accidentally grabbed, stepped on barefoot, or trapped against skin while cleaning or moving furniture. They rarely bite unprovoked, and many attempted bites fail entirely because their forcipules aren't strong enough to pierce skin without direct pressure.
Should I use ice or heat on a house centipede bite?
Use a cold compress, not heat. Cold reduces pain, slows swelling, and calms local inflammation at the puncture site. Wrap ice in cloth rather than applying it directly to skin, and use it in short cycles of about 10 minutes on and 10 minutes off until discomfort eases.
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