I have mentioned the NLP Allergy Cure a few times and for those who are not familiar with it, here is a quick walkthrough. The cure was originally created by Robert Dilts, one of the main NLP developers. If you have any questions about the steps, please let me know.
An allergy can be framed as an overreaction of the immune system. Since the immune system is controlled by the unconscious mind, we can re-educate the unconscious mind to use appropriate responses to the substances that used to cause allergic responses.
1- Calibrate the allergic response
2- Frame the allergy as a mistake (appreciate intent).
3- Check for secondary gain.
4- Identify and anchor a counter example. (For instance: allergic to hay, but not grass; then use grass)
5- Dissociate and fire off the anchor (behind Plexiglas).
6- Gradually introduce the allergen to the person behind the Plexiglas and fire off anchor.
7- Associate into that person handling the allergen and fire off anchor.
8- Future pace and fire off anchor. (Imagine you go to the future and test it. Does it create any response?)
9- Real test while firing off anchor.