i have a skin rash behind my ears and neck, i think it may be an allergy, but it's not going away. it's very red and so itchy. my lymph nodes a few weeks ago were so swollen, then i took some allergy pills and it started to go away now its back and getting worse. A few weeks ago I dyed my hair and by head swelled in addition to what i already had, i think i'm allergic to dairy products maybe sugar not sure, it happens with creamers and maybe even wine not 100% Sometimes I feel this pain in my left side by my arm pit, feels like a lump, i comes and goes away too. also my feet sometimes get itchy from the allergy, right now it's mostly around my neck and behind my ears. A few week ago i felt as though i had trouble breathing at night, I have been taking benydrl. what do you think it could be?