Originally Posted by BatteredBenz

Bees have stingers that are barbed, and the bee can and often ends up sacrificed when the stinger is pulled free from its body, very often when that occurs the venom sac is left still attached and pumping to the embedded stinger.

Wasps of which there are hundred of varieties generally do not have barbed stingers and therefore can hit you multiple times before getting killed or getting away.

for most insect stings the baking soda/water slurry will offer some pretty amazing relief after an hour or two. Any anti-histamine type over the counter stuff will help stem the bodies reaction to the venom.