Most centipedes are not very dangerous to humans, but they can bite and it can hurt, a bit like a bee sting. A few large tropical or desert species can cause intense pain and, rarely, more serious reactions, especially in children or people with allergies.

What “dangerous” really means

  • Centipedes are venomous predators that use venom to hunt other bugs, not people.
  • Typical house centipedes rarely bite humans and usually run away instead of attacking.
  • When bites do happen, symptoms are usually local pain, redness, and mild swelling that settle within a day or two.

When centipedes are a real concern

  • Large species like some giant desert or tropical centipedes can deliver very painful bites, with swelling and temporary systemic symptoms (nausea, dizziness, fast pulse) in some cases.
  • Children, pets, and people with allergies may be more sensitive to the venom and should be watched more closely after a bite.
  • Severe reactions (trouble breathing, throat swelling, widespread hives, worsening pain after 24–48 hours) need prompt medical attention.

What to do if you’re bitten

  1. Stay calm and gently move away from the centipede.
  1. Wash the area with soap and water to lower infection risk.
  1. Apply a cold pack (wrapped in cloth) for 10–15 minutes at a time to reduce pain and swelling.
  1. Use over‑the‑counter pain relief or an antihistamine if needed and if safe for you.
  1. See a doctor or urgent care if:
    • Pain is severe or keeps getting worse
    • The bite looks infected (increasing redness, warmth, pus)
    • You have any signs of allergy like breathing difficulty or facial swelling.

Are house centipedes “good” or “bad”?

  • House centipedes help control other pests such as roaches, silverfish, and spiders, which is why some pest professionals consider them beneficial in low numbers.
  • Many people still prefer them gone because of their speed and appearance, not because of actual medical danger.
  • If you want fewer centipedes indoors, reducing moisture, sealing cracks, and controlling other insects they feed on are the main steps.

Mini FAQ

  • Are centipedes dangerous to humans?
    For most people, no: bites are rare and usually mild, though painful.
  • Are they poisonous or venomous?
    Technically they are venomous (they inject venom), but the venom of typical house species is not considered medically dangerous to humans.
  • Do they carry diseases?
    There is no evidence that centipedes spread human diseases like mosquitoes or ticks do.

Information gathered from public forums or data available on the internet and portrayed here.

TL;DR: Centipedes are creepy, venomous little hunters, but ordinary house centipedes are not considered dangerous; their bites just hurt and rarely cause serious problems, with large exotic species being the main exception.