In general, bumblebees are peaceful insects and will only sting when they feel cornered or when their hive is disturbed. When a bumblebee stings, it injects a venom into its victim. ... For most people, a bumblebee sting will only cause local swelling, but can cause an allergic reaction in some cases.

Does Bombus Lapidarius sting?

Bumblebees can sting, at least the queens and workers can, and their sting is not barbed like that of the honeybee, so they can sting more than once. The photographs above and below show the sting of a Bombus lapidarius queen taken from different angles. I found her dead in the garden one morning.

Can tree bumblebees sting?

Tree bumblebees aren't particularly aggressive, although they are likely to defend their nest if they feel threatened. ... Male bumblebees cannot sting as they don't have a stinger (the stingers are modified egg laying tubes called ovipositors which obviously only females will have).