Have you read the articles from The Doctor Within site? It explains what allergies are in a really exciting way. I would suggest you read, Journey to the Center of the Colon first and then the Allergies article.
The link below is about my friend that got rid of his allergies through a bit of fasting, diet change and some cleanses...
My friend only did one Liver Flush - but if I were you, I'd do a few to get the overloaded toxins out of my liver...