Remove the stinger and keep Benadryl or another antihistamine on hand. If it's just a redness and swelling to the sting site, use cold presses to help with the inflammation.
If a person who is allergic to bees may go into a coma if stung. See your dr. immediately. In the meantime, take an antihistamine to counteract the effects.
An Epi-pen containing a dose of epinephrine is prescribed for a person allergic to bee venom. It is self-injected following a sting. An ER visit may also be necessary.