Bee stings most commonly occur when a person may unknowingly disturb a nest. While bees are passive and just want to be left alone, like many insects. Respectfully, each bee has a specific role that they play and there are some bees in hives that are designated to protect the nest. Many times the protector bees will fly out in a swam and attack any perceived threat they sense. There are some bee species that are particularly aggressive.  Listed here are are some types of bees considered aggressive. Bees are different than other stinging insects. Bees have a barbed stinger that causes it to become stuck in the skin of the person when stung. This causes the stinger to rip out of the bee when it flies off, killing it. Wasps and hornets have smooth stinger that allow them to sting again and again, there by living a little longer than bees. Most people find the sting painful, but other than some redness and maybe some swelling, the injury will heal. For a select few, however, the reaction to the bee sting can cause a severe allergic reaction that can cause difficulty breathing and anaphylactic shock that can be life threatening. Some tips when dealing with Bee Stings or when near swarms of Bees.