Why do bees die after they sting something?
Bees don’t always die after stinging, the reason they do is because they leave there stinger stuck in your skin along with some other internals so that it will continue to pump venom in. This loss of internals is what kills them if you pull a bee that has stung you out carefully and keep the stinger attached they will be perfectly fine.
The stingers have barbs which face the opposite way to the stinger, like a hook.
When they pull away the stinger comes off the bee along with its organs, the stinger stays embedded and the bee dies shortly after