Allergies of any type requires they be life threatening reactions. Mainly hives. Simply said, if you react, your are sensitive, if you have hives or other life threatening reactions then it is an allergy. Avoidance maybe the only solution for many sensitivities and allergies. I am allergic to aspirin and all non steroidal antiinflammatories NSAIDs. Avoidance is the only solution. I am also allergic to a few foods and again avoidance is the solution. Hope this helps you understand allergies vs. sensitivities.