Nickel allergy

Editor-In-Chief: Prab R Tumpati, MD
Obesity, Sleep & Internal medicine
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Nickel allergy
Allergic contact dermatitis
Synonyms	N/A
Pronounce	N/A
Specialty	N/A
Symptoms	Itching, rash, redness, swelling
Complications	Chronic dermatitis, infection
Onset	After exposure to nickel
Duration	Variable, can be chronic
Types	N/A
Causes	Nickel exposure
Risks	Jewelry, watches, belt buckles, coins
Diagnosis	Patch test
Differential diagnosis	Irritant contact dermatitis, atopic dermatitis
Prevention	Avoidance of nickel-containing items
Treatment	Topical corticosteroids, antihistamines
Medication	N/A
Prognosis	N/A
Frequency	Common, especially in women
Deaths	N/A

Nickel allergy is a common cause of allergic contact dermatitis, an inflammatory skin condition that occurs when the skin comes into contact with nickel-containing items. This type of allergy is prevalent worldwide and can cause significant discomfort and skin irritation.

Pathophysiology

Nickel allergy is an immune-mediated response. When nickel ions penetrate the skin, they bind to skin proteins, modifying them in a way that the immune system recognizes as foreign. This triggers a type IV hypersensitivity reaction, mediated by T cells. Upon re-exposure to nickel, these sensitized T cells release inflammatory cytokines, leading to the symptoms of dermatitis.

Symptoms

The symptoms of nickel allergy typically appear 12 to 48 hours after exposure to nickel. Common symptoms include:

• Redness and rash
• Itching
• Swelling
• Dry patches of skin that may resemble a burn
• Blisters and draining fluid in severe cases

Common Sources of Nickel

Nickel is found in a variety of everyday items, including:

• Jewelry, especially earrings and body piercings
• Watches and watchbands
• Belt buckles
• Zippers and buttons
• Eyeglass frames
• Coins
• Mobile phones

Diagnosis

Diagnosis of nickel allergy is primarily clinical, based on the history of exposure and the appearance of the rash. A patch test can be performed to confirm the diagnosis. In this test, small amounts of nickel are applied to the skin under an adhesive patch, and the skin is observed for a reaction.

Management

Management of nickel allergy involves avoiding contact with nickel-containing items. Strategies include:

• Choosing jewelry made of stainless steel, titanium, or other nickel-free materials
• Using plastic or coated metal items
• Applying barrier creams to protect the skin
• Using topical corticosteroids to reduce inflammation

Prognosis

Nickel allergy is a chronic condition, and once sensitized, individuals will remain allergic for life. However, with proper management and avoidance of nickel, symptoms can be effectively controlled.

See also

• Allergic contact dermatitis
• Hypersensitivity
• Patch test