Many people are allergic to the stings of bees, yellow jackets, hornets, wasps, or fire ants, and the reaction can be life-threatening. Emergency action is essential, because without prompt treatment the person may die. If any member of your family has this type of allergy, ask your doctor what procedure to follow in the event of stings. For stings that don't trigger an allergic reaction, there are numerous herbal and folk remedies. Try cutting an onion in half and pressing the cut side to the sting, holding it there for at least ten minutes.
Onions contain an enzyme that break down the prostaglandin's that form in response to a sting.
Or try meat tenderizer, which contains an enzyme that breaks down proteins and stops pain and swelling if applied soon enough after a sting. Avoid using pesticides, especially broad-spectrum or residual chemicals. Most products meant to kill pests also kill beneficial insects. Foil pest attacks with physical barriers, such as cutworm collars or floating row covers. High-pressure sprays of water will control aphids.