If you have a self-treatment kit, inject the epinephrine immediately, without waiting for symptoms to start. Then see your doctor to make sure the danger has passed. Don't swat at them. Never strike, stir up, or throw anything at a wasp nest or beehive. Stay away from places that may attract stinging insects.
Yellow jackets nest in the ground and hornets in trees and bushes.
Every type of stinging insect is attracted to flowers. Bees are more likely to sting in gloomy weather than on bright sunny days. Stay away from wood piles. Be very careful when gardening or mowing the lawn. Also take precautions in picnic areas, orchards, beaches, and other places where there are exposed foods, fragrances, and bright colors.