What is nickel allergy and how common is it?

It's an allergic contact dermatitis triggered by skin contact with nickel, causing redness, itching, and sometimes blistering where the metal touches the skin. It's one of the most common contact allergies in Europe, affecting an estimated 8–19% of adults, with women considerably more affected than men, largely linked to earlier or more frequent piercing exposure.

Does 'nickel-free' mean the same as hypoallergenic?

No, and the distinction matters. Nickel-free is a specific, checkable claim about one allergen; hypoallergenic is a vague, unregulated claim about allergic potential in general. Someone can be nickel-free and still contain other recognised sensitisers, such as cobalt or, less commonly, palladium, so nickel-free is the more meaningful but still narrower claim.

Can gold jewellery still contain nickel?

Yes, particularly at lower purities. 9ct and 14ct gold contain proportionally more alloy metal to make up the remaining weight, and nickel has historically been a common choice for that alloy, especially in white gold. Higher-purity gold, 18ct and above, contains less alloy overall, and reputable UK jewellers increasingly use palladium rather than nickel to whiten it.

How is nickel release from jewellery actually tested?

The standard test, EN 1811, simulates a month of sweat contact with the metal and measures how much nickel migrates from the surface over that period. Plated items are additionally tested to EN 12472, which simulates the abrasion the coating experiences in normal wear before the release test is applied.

What should I do if I think jewellery is causing a reaction?

Remove the item and let the skin settle, then see a GP or dermatologist if the reaction persists or recurs, since only a clinician can properly diagnose the cause and rule out other explanations. Patch testing, arranged through a dermatology referral, can confirm exactly which metal or substance is responsible.

What does 'hypoallergenic' actually mean in jewellery?

Walk into almost any jewellery shop or scroll any jewellery website and you'll see "hypoallergenic" attached to earrings, rings and chains as though it were a certification. It isn't one. Understanding what the word does and doesn't promise, and what UK and EU law actually regulates instead, makes it much easier to judge a genuine low-reaction-risk piece from a marketing label.

Hypoallergenic is not a legal or medical standard

In the UK and EU, as in the US, "hypoallergenic" has no regulated definition when applied to jewellery. There's no government body, testing standard, or certification scheme a manufacturer has to satisfy before printing the word on a listing or a hang tag. Any brand can use it on any product, based on any reasoning, or none at all. It might mean the piece is nickel-free, it might mean it's made from a metal the brand believes is generally well tolerated, or it might mean nothing more specific than "we think sensitive-skin customers will like this."

That doesn't make the term meaningless as a rough signal, reputable jewellers using it usually do have a specific reason, but it does mean you can't treat it as a guarantee. If avoiding a reaction matters to you, the word to look for isn't "hypoallergenic"; it's the actual metal composition and, ideally, evidence that it meets the nickel release limit that UK and EU law does enforce.

What is actually regulated: nickel release under REACH

The one part of this picture with real legal teeth is nickel. UK and EU law restricts how much nickel is allowed to migrate from an item into contact with skin, not how much nickel the item contains in total, which is an important distinction. An item can legally contain nickel as part of an alloy, provided the surface releases less than the permitted amount when tested.

This restriction originated as the EU's Nickel Directive (94/27/EC) and was folded into the wider REACH regulation as Annex XVII, entry 27, when REACH consolidated EU chemical law. It's retained in UK law post-Brexit under UK REACH. The limits are specific: items intended for direct and prolonged contact with skin, most jewellery, watch cases and clothing fasteners, must release no more than 0.5 micrograms of nickel per square centimetre per week. Items inserted into pierced skin, such as earring posts, face a stricter limit of 0.2 micrograms per square centimetre per week, reflecting the more sustained, unbroken-skin contact piercings involve.

Compliance is measured using two standard tests: EN 1811, which simulates roughly a month of sweat exposure and measures the nickel that migrates out, and EN 12472, applied to plated items, which first simulates the wear and abrasion a coating experiences in normal use before the release test is run, so a plated piece can't pass simply because the plating itself contains no nickel if the coating is thin enough to wear through quickly. In practice, nickel-related non-compliance is one of the most common reasons jewellery gets flagged in UK and EU market surveillance, which tells you the rule is meaningful, not decorative.

How common is nickel allergy, really

Nickel allergy is genuinely common, not a niche sensitivity. Across Europe, studies estimate that somewhere between 8% and 19% of adults are sensitised to nickel, with a pronounced skew toward women, plausibly reflecting historically higher rates of ear piercing and more frequent exposure to nickel-releasing costume jewellery. Some estimates put the figure at roughly 17% of women against around 3% of men. It's one of the most frequently identified causes of allergic contact dermatitis investigated by dermatologists, and once someone is sensitised, the reaction tends to recur with any sufficiently nickel-releasing exposure, not just the original trigger item.

This prevalence is exactly why the regulation exists, and why the distinction between "contains no nickel" and "releases negligible nickel" matters so much in practice for anyone who already knows they react.

Which metals are genuinely low risk

A handful of materials have a strong track record of low reaction rates, for reasons grounded in their actual composition rather than marketing.

Platinum. Jewellery-grade platinum is typically alloyed with metals such as ruthenium, cobalt or iridium rather than nickel, and at typical UK purities (950, meaning 95% pure platinum) there's very little room for any other metal to be present in meaningful quantity. Genuine nickel-triggered reactions to platinum are rare.

High-karat gold. Pure gold itself doesn't cause allergic reactions; the risk comes entirely from whatever it's alloyed with to add strength or change colour. Higher-karat gold, 18ct and above, contains a higher proportion of pure gold and therefore less alloy metal overall, which reduces the absolute amount of any potential allergen present, all else being equal. Lower-karat gold (9ct, 14ct) contains more alloy by weight and has historically been more likely to include nickel, particularly in white gold formulations.

Palladium white gold. Rather than using nickel to whiten gold, some white gold alloys use palladium instead, alongside metals like silver and copper. Palladium is itself a well-tolerated metal for the great majority of people, and this alloy route avoids the nickel exposure question entirely rather than just minimising it.

Titanium. Widely used in body jewellery, titanium is essentially chemically inert on skin and forms an extremely stable, protective oxide layer on its surface, which is why it's a common recommendation for fresh piercings and anyone with a confirmed metal allergy. It's less commonly used in fine bespoke jewellery, largely for aesthetic and workability reasons rather than any safety concern.

Why "nickel-free" is not the same as "allergy-free"

Even a genuinely nickel-free piece isn't a guarantee against every possible reaction. A smaller proportion of people who react to nickel also cross-react to other metals used in jewellery alloys, cobalt is the most frequently cited example, and a much smaller number of people have primary sensitivities to metals like palladium or, rarely, gold itself. Skin can also react to non-metal causes entirely, residue from soap, lotion or perfume trapped against the skin under a ring, for instance, that has nothing to do with the metal at all.

This is why "nickel-free" is a more useful claim than "hypoallergenic," because it's specific and checkable, but it still isn't an absolute promise that a given individual won't react to a given piece. If you have a known sensitivity to a specific metal, the reliable approach is to ask for the exact alloy composition, not just a general reassurance.

What to do if you think you're reacting

If jewellery is causing redness, itching, or irritation where it sits against the skin, the sensible first step is to remove it and let the area settle. If the reaction is mild and resolves quickly, it may simply have been friction or trapped moisture rather than a true allergy. If it persists, recurs with similar items, or is severe, the appropriate next step is to see a GP or dermatologist rather than guessing at the cause yourself. A dermatologist can arrange patch testing, a diagnostic procedure that exposes small areas of skin to a panel of common allergens, including nickel, cobalt and other metals, under medical supervision, to identify precisely what you're reacting to. This is genuinely useful information, since it lets you shop with confidence rather than avoiding metals unnecessarily, or missing an allergen that isn't nickel at all. This article is informational and isn't a substitute for that diagnosis.

The bottom line

Treat "hypoallergenic" as a loose signal at best, since nothing in UK or EU law requires it to mean anything specific. What genuinely protects you is the nickel release limit set out in REACH Annex XVII, entry 27, and choosing metals, platinum, high-karat gold, palladium white gold or titanium, that carry a real, mechanistic reason to be low risk rather than a label that does. If you already know you react to a metal, ask jewellers for the specific alloy composition, and if symptoms appear or persist, get a proper diagnosis from a GP or dermatologist rather than relying on trial and error.