Metal sensitivity is common.
Nickel frequently causes rashes. It is used in jewelry, wrist watches, and clothing fasteners as well as in many other substances.
Other metals besides nickel can be involved in sensitivity reactions and may impact dental work and joint replacement procedures.
Testing for sensitivity is done through blood sampling or through skin testing with dilute ionic solutions.
Treatment involves avoiding exposure as much as possible and correcting for other underlying sensitivity, allergy or toxic conditions. When exposure cannot be avoided, neutralization may be helpful.