Will putting a penny on a bee sting do any good?

Do you honestly think that it will do anything?? Maybe it will just infect the wound because coins are dirty.

Actually - the copper penny has long been known to have bactericidal qualities - which means the heavy metal of copper inhibits the growth of bacteria. The same is true for brass - which is why so many doorknobs are made of brass, because it also has bactericidal qualities. As far as the penny's ability to ease the pain/swelling of a bee sting - removing the stinger, cleaning the wound site with soap and water, plus placing an ice pack on the wound to relieve pain and swelling are still the best tested-true methods. If abundant redness/swelling occurs and/or you feel shortness of breath, seek immediate medical attention for these are possible signs of an allergic reaction.

In re brass door knobs (which really has nothing to do with this bee sting question): door knobs were made of brass well before the role of bacteria in illness was accepted. Brass was used for its metallurgical qualities, not because it was bactericidal.