Eczema Treatment Care

I have in the past needed an epipen on hand to administer when this happened. It has happened a few times. I break out in wheels and hives itchy mouth swelling throat and airway restriction. I went to an allergy dr and he said he has never seen this before ( as though he didnt believe me) but I have been to the er for it a hand full of times. It can happen when I play tennis, run, play basketball, sweating mainly. Anyone ever hear of this? Oh yeah and a contact dermatitis to top it off even when I am not active… HELP!