What is the difference between bee sting and wasp sting?

A bee stinger is barbed and once inserted into its target, the bee can not retract it so as the bee leaves the victim it leaves the stinger and a bit of its insides behind (the bee will eventually die as a result). The stinger continues to inject venom after the bee departs and should be removed without squeezing it.

A wasp stinger is not barbed and the wasp can therefore insert the stinger into the target several times and at different sites. The wasp survives the process.

Both insect inject a toxic fluid containing a complex protein.