Scorpion stings are painful but rarely life-threatening. Healthy adults usually don’t need treatment for scorpion stings. Young children and older adults are most at risk of serious complications.
Scorpions are arthropods — a relative of insects, spiders and crustaceans. Bark scorpions — the only scorpion species in the U.S. with venom strong enough to cause serious symptoms — are generally about 1.6 to 3 inches (4 to 8 cm) long, including a segmented tail with a stinger that can deliver venom. They’re found mainly in the desert Southwest. Worldwide, of more than 2,000 species of scorpions, about 100 produce venom serious enough to be fatal.
Scorpions have eight legs and a pair of lobster-like pinchers and a tail that curves up. They’re generally more active at night. They usually won’t sting unless provoked or attacked. Most stings occur when they’re accidentally grabbed or stepped on or brushed against the body.