Stings and bites from insects are common. They often result in redness and swelling in the injured area. Sometimes a sting can cause a life-threatening allergic reaction.

Arthropods are insects that live primarily on land and have 6 legs. They dominate the present-day land fauna. They represent about three-fourths of known animal life. In fact, the actual number of living species could range from 5-10 million.

The orders that contain the greatest numbers of species are Coleoptera (beetles), Lepidoptera (butterflies and moths), Hymenoptera (ants, bees, wasps), and Diptera (true flies).