How To Cure Hives On The Body Which Increases After Eating Non Veg Food?

Hello Doctor,I have been having hives for the past 9 months, i have been on heavy doses of prednisone that dint help after the medication was over.I am taking immune care herbal pills and also sepia which i got from a homeopathic doctor.I still break out but not like before, do you have any suggestions to offer me. I am not allergic to any external things.But yes if i eat eggs or chicken i tend to break out more.other than that nothing. Can you give me any inputs in this ?