The nickel allergy is a contact allergy. Contact with the allergen nickel causes reddening of the skin, itching, pustules and rashes. Nickel allergy is a type 4 allergy – late type. The allergic reaction occurs 12 hours after contact with the allergen. The chip ALL-NSA contains the oscillations, frequencies and information that are supposed to contribute to the alleviation/resistance of a nickel jewelry allergy.