Contact allergic dermatitis to nickel may develop at any age.
Once this nickel allergy has occurred, it persists for many years, often life-long.
Nickel allergy is more common in women, probably because they are more likely to have pierced ears than men, although this is changing.
The degree of allergy varies.
Some people develop dermatitis (also called eczema) from even brief contact with nickel-containing items, while others break out only after many years of skin contact with nickel. Some people develop intermittent or persistent eczema on their hands and feet.
It is usually a blistering type of eczema, known as pompholyx.
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