If you get stung by a wasp, hornet, bee etc., wet a small wad of tobacco, saliva is best but water will do it too, and apply it to the bite site. If stung by a bee, remove the stinger first by scraping it out with either a knife blade, your fingernail or some other edged apparatus. Wasps, hornets and the like have a smooth stinger that is retracted after they sting to sting again. Bees have a barbed stinger that stays in the site along with the venom sac that continues to pump venom into the site.
When a bee stings, it stings once then dies. Others will likely come back for more.
Age of the tobacco does not matter, you can use a fresh leaf just off the plant or an old smoke you found under the trash in the back of your truck, it'll work. I'd prefer a somewhat fresher bit of tobacco to apply myself however.
