...if you are at home, then apply Tooth Paste on the affected area. The chemicals in tooth paste act as neutralizing agents for the venom injected by the bee. If possible try to remove the stinger stuck in your skin.
Today morning, a big bee stung me in the left ear. Aaa! that was very painful. The ear has swollen. Now I have one bigger ear (for a couple of days, I guess). Thank God, no allergic reaction took place.