What should you know about nickel rash on neck?

Nickel allergy is a form of allergic contact dermatitis. The neck is exposed when a chain, pendant, clasp, or metal trim stays against the skin, especially with heat, perspiration, or rubbing. The area may become red, dry, scaly, bumpy, blistered, or sore. The rash can appear after repeated exposure rather than the first time you wear an item. If it does not match the contact pattern, occurs without jewellery, or involves other body sites, a healthcare professional should consider alternatives such as atopic dermatitis, heat rash, ringworm, or scabies.

Take off necklaces and other metal touching the area. Wash with lukewarm water and a gentle, fragrance-free cleanser, then pat dry. Apply a bland moisturiser several times as needed and avoid scratching, shaving over the rash, or using perfume on it. A pharmacist or clinician can recommend an appropriate treatment after examining the skin. Keep the item separate from jewellery you tolerate, and consider nickel-free materials once the neck is clear. If symptoms return each time a particular item is worn, stop using that item.

Seek medical advice when the rash lasts despite avoiding metal, interferes with sleep, or keeps coming back. Prompt review is sensible for warmth, pus, crusting, increasing pain, fever, or redness that is spreading. Emergency care is needed for breathing difficulty or sudden swelling of the face, mouth, or throat.

Does the shape and timing suggest nickel contact allergy? Would patch testing be useful? What can I safely apply to the neck, and which jewellery materials should I avoid?