Spotting a fast-moving, many-legged insect darting across your basement floor can feel like something straight out of a nightmare. But in most cases, that unsettling creature is likely a House centipede — an insect known more for its frightening appearance than any real danger to humans. These creatures are commonly found in dark, damp areas such as bathrooms, basements, laundry rooms, and crawl spaces where moisture levels are high and smaller insects are plentiful.

Despite their alarming speed and dozens of legs, house centipedes are generally harmless to people. They prefer avoiding human contact and spend most of their time hunting other pests hiding inside the home. Their venom is intended for tiny insects like cockroaches, silverfish, termites, spiders, and ants. Although they technically can bite, incidents are extremely rare and usually result in only mild irritation similar to a bee sting for most people.