Have you ever studied or practiced desensitizing over a long period of time? I was born with eczema, allergies, and just plain whimpy health and suffered all through my growing up years, and then did the dumb choice of marrying a farmer. I was so desperate and couldn't afford or have the time for trips to the specialist so I did my own thing by gently exposing myself in small doses or amount of time to anything that made me itch, sneeze, cough, or feel bad. No one believed in me and thought perhaps I should divorce, but I was determined to feel better, and with the big garden and well balanced eating I got better in twenty years. In fact my basic health is pretty good despite living with a stressful husband while the marriage was a disaster. But I kept at it, and truly believe that desensitizing myself over the years a little at a time can be an effective cure and can alleviate many chronic problems.
On the other hand, my sister catered to her many "allergies" and died with chronic diseases that she declared were none of her fault. She also blamed the doctors, six of them, when her visits did not result in a fast cure. This is a worst case scenario, but I certainly know what it feels like to itch all over. I only had one panic attack and with the advice of my paramedic son and his friend, taught myself to not do that again without the aid of a psychiatrist. If we are born with sensitive bodies it can be a lifetime of effort to control or eliminate the exposures and to get sensitized to some exposure. Yes, I avoid poison ivy!