Bee stings are not just a painful inconvenience; they are the result of a highly evolved biological defense mechanism. When a bee stings, it injects venom, which contains a complex mixture of proteins ...

Bee sting Bees do not bite — but they sting. A bee or wasp sting can leave a red, painful, itchy bump that may swell and grow larger within a few hours. Most bees are not aggressive, and only ...

a bee sting is an allergic reaction and causes inflammation which swelling is part of. "The body depending on the way it handles these reactions will induce swelling of different magnitudes.