For most people, the bite or sting of a bee, wasp, ant, mosquito, or other insect causes minor irritation. For people allergic to insect bites or stings, the results are a lot more discomforting, and sometimes even dangerous.

For those allergic to bites and stings, their skin breaks out in hives, the eyes itch, the chest and throat feel constricted, a dry cough comes on, and there is often nausea, abdominal pain, vomiting, and dizziness.

In the highly sensitive, breathing becomes difficult,...