The toxicity of scorpion venom varies by species. A given species' venom may contain many chemicals, some toxic to insects, others toxic to mammals. Scorpion species with smaller and more slender claws generally have more toxic venom.
Scorpion stings are much more dangerous for infants and small children. The toxic effects of the venom include extremely high body temperatures, respiratory paralysis, very low or very high blood pressure, and a rapid heartbeat (tachycardia).