What should you know about metal nickel allergy?

Nickel contact allergy is a delayed skin reaction. A rash may develop after contact with jewellery, watch backs, belt buckles, clothing fasteners, phones, tools, or other metal items that release nickel. The reaction may be limited to the contact area, although scratching can spread irritation beyond it. Repeated exposure can make the skin dry, cracked, thickened, or sore.

A clinician may consider the shape and location of the rash and ask about new or repeated metal contact. Patch testing can help identify nickel sensitivity when the diagnosis is uncertain or the rash keeps returning. Other causes, including irritant dermatitis, eczema, or infection, can look similar.

Remove the suspected item and note when the rash improves or returns. Choose products labelled nickel-free or made from a material your clinician recommends, and use a barrier between skin and metal when practical. Avoid testing an item on irritated skin, because this can intensify the reaction.

Wash the area gently, pat it dry, and apply a plain moisturiser to support the skin barrier. A clinician may recommend a short course of a topical corticosteroid for inflammation; use it on the advised area for the advised time. Do not share prescribed creams or apply them to the face, folds, or broken skin without specific instructions.

Arrange medical assessment if the rash is spreading, painful, oozing, crusted, recurrent, or not settling after the suspected metal is removed. Seek urgent help for facial or throat swelling, breathing difficulty, widespread hives, fever, or feeling faint. These symptoms need prompt assessment because they can indicate a more serious reaction or another condition.

Could this rash be nickel allergy or an irritant reaction? Would patch testing help? Which metals and everyday objects should I avoid? Is a topical corticosteroid suitable for this location, and how should I use it safely? What signs would mean that the rash is infected or needs urgent review?