The answer to 'are centipede dangerous' is that most centipedes are not dangerous to humans. While some larger species can deliver a painful bite, most common household centipedes found in North America are relatively harmless. Their bites may cause mild skin irritation or swelling, but are not considered medically significant.
Centipedes are predatory insects that feed on other small invertebrates like insects, spiders, and even other centipedes. They use their fangs to inject venom to subdue their prey, but the venom is not usually potent enough to cause serious harm to humans. Only the largest tropical species found in other parts of the world are considered potentially dangerous to people.