Natural Cures for a Bee Sting

We have a terrible wasp and yellow jacket problem. We usually use lavender essential oil for mild stings and charcoal poultices for more serious ones. But my children get tired of poultices and find them inconvenient, so they take off the poultices and they end up swelling up. I have found peppermint essential oil, undiluted, takes out the heat and swelling very well, even on bites that are a couple of days old and still bothering them.