“Hypoallergenic” is not a regulated term. No standards body defines it, no test is required to print it, and a manufacturer can put it on a product that will give you a rash tomorrow.
What is regulated is nickel release — how much nickel actually migrates onto your skin per week. That is the number that predicts whether you will react, and it is the thing to look for instead.
What you are almost certainly reacting to
Nickel. It is the most common contact allergen in the world, and jewelry is the most common way people are exposed to it. Pierced ears in particular: the piercing itself is frequently what sensitises someone in the first place, because it puts metal in direct contact with broken skin for weeks.
Two other metals cause contact allergy far less often — cobalt, which often travels with nickel, and chromium, usually from tanned leather rather than jewelry. If you react to jewelry, nickel is the overwhelming favourite.
An allergic reaction looks like: redness under the piece, itching, sometimes small blisters or weeping in a severe case, sometimes dry scaly skin after repeated exposure. It appears hours to a day or two after contact, not immediately, which is why people often blame the wrong piece.
Green skin is a different problem entirely
This gets conflated constantly and it is worth separating, because the fix is completely different.
Green skin is chemistry, not immunology. Copper in the metal reacts with the salt and acids in sweat to form copper salts, which are green, and they stain the skin they are sitting against. It is harmless. It washes off with soap. Your body is not objecting to anything.
What it does tell you is what the piece is made of. Copper alloys — brass, bronze, so-called nickel silver — will do this. Stainless steel contains no meaningful copper and cannot. So a green mark is a free material test, and one of the more useful things in this article: it means the piece was never stainless steel underneath, whatever the listing said. There is more on how to read the base metal in the gold-plated stainless steel buyer’s guide.
You can be perfectly happy wearing a piece that turns your finger green. You cannot be happy wearing one you are allergic to.
The metals, ranked by how safe they actually are
| Metal | Risk | Notes |
|---|---|---|
| Implant-grade titanium | Lowest | The correct answer for new piercings and for anyone with a diagnosed allergy |
| Niobium | Lowest | Same idea, harder to find |
| Platinum | Very low | Expensive, rarely relevant at this price point |
| 18K–24K yellow gold | Very low | The higher the karat, the less of anything else is in it |
| 14K gold | Low | More alloy metals; usually still fine |
| 316L stainless steel | Low for most people | Contains nickel, but releases very little |
| Sterling silver | Low | Usually fine; some alloys include nickel |
| White gold | Variable | Traditionally alloyed with nickel. Ask before assuming |
| Brass, bronze, nickel silver | High | Avoid if you react to anything |
| Unspecified “alloy” | High | If nobody will say what it is, assume the worst |
The one that surprises people is white gold. It is expensive, it is real gold, and the classic alloy used to achieve the white colour is nickel. A palladium-alloyed white gold is fine; a nickel-alloyed one is a problem hiding behind a high price tag.
Where stainless steel actually sits
Honestly: it is good for most people and it is not nickel-free.
316L stainless steel contains roughly 10–14% nickel. What makes it wearable anyway is that the nickel is bound into the alloy’s crystal structure rather than sitting loose on the surface, so the amount that migrates onto skin is extremely low. This is why surgical instruments and implants use it, and why most people with mildly sensitive skin wear it with no trouble at all.
The European rules put a number on this: for items in prolonged contact with skin, the release limit is 0.5 micrograms per square centimetre per week, and for posts inserted into a fresh piercing it drops to 0.2. Properly made 316L passes comfortably. The test is EN 1811, and a manufacturer who has run it can tell you the result.
So the practical advice is: if your skin is a bit sensitive, stainless steel is very likely fine. If you have a diagnosed nickel allergy — the kind where a watch back leaves a rectangle on your wrist — do not rely on “surgical steel” as a phrase. Ask for the test figure, or buy titanium.
Ask this, not that. “Is it hypoallergenic?” gets you a yes from everybody. “What is the base metal, and has nickel release been tested?” gets you either a specific answer or a change of subject, and both are informative.
Does gold plating protect you?
Yes — while it is intact, and that qualification is the whole point.
Gold is chemically inert and does not react with skin. A gold layer over a steel core is a physical barrier: your skin touches gold, the alloy underneath never touches you, and someone who reacts to bare steel may wear a plated piece with no problem at all.
The catch is that plating wears, and it wears exactly where the piece rubs against you — the inside of a ring, the back of a clasp, the underside of a bracelet. Those are the same points that have the most skin contact. So a plated piece is a barrier with a time limit, and a reaction that appears after eighteen months of happily wearing something is usually this, not a new allergy. The mechanics of how and where plating thins are covered in does gold-plated stainless steel tarnish.
For most people this is irrelevant — they never react to the steel either. For someone with a real allergy, it means a plated piece is a temporary solution rather than a permanent one.
Piercings deserve their own rules
A healed earlobe you have had for twenty years and a piercing done last month are completely different situations.
A fresh piercing is an open channel through tissue. There is more metal-to-skin contact, the skin is broken, and the exposure runs twenty-four hours a day for weeks. It is both the most likely moment to develop a nickel sensitivity and the worst moment to discover you already have one.
For a new piercing, use implant-grade titanium or 14K–18K gold. Not plated anything, whatever the price. Once it is fully healed — which is longer than most people think, several months for cartilage — decorative pieces are fine.
For healed lobes, smooth plated earrings are one of the lower-risk things you can wear, because earlobes sweat far less than wrists and fingers and there is minimal friction. Something simple like sphere earrings has no crevices to trap residue and very little surface contact; the wider earrings range works the same way.
How to find out whether it is really nickel
Two reliable routes, one of them very cheap.
A dermatologist’s patch test. The definitive answer. Small amounts of standard allergens are taped to your back and read after two and four days. If you have had repeated reactions, this is worth doing once and knowing forever.
A nickel spot test at home. A dimethylglyoxime kit — two bottles, a cotton bud, thirty seconds. It turns pink if free nickel is present on the surface of an item. It tests the object, not you, which makes it genuinely useful for checking a piece you already own or a new purchase before you wear it all day. Kits are inexpensive and available online.
If a reaction is severe, spreading, weeping or not settling after the piece comes off, that is a doctor’s question rather than a jewelry one.
Habits that reduce reactions regardless of metal
- Keep it dry. Sweat is the mechanism — it dissolves metal ions and carries them to your skin. Moisture makes every metal worse and dryness makes every metal better.
- Take it off at the gym. Sweat plus friction is the worst combination there is.
- Rinse and dry after a hot day, rather than leaving a salty film sitting under a bracelet all evening.
- Do not sleep in rings if your hands react. Eight unbroken hours of contact is a lot of exposure.
- The clear nail polish trick works, briefly. Painting the contact surface does create a barrier, and it does wear off within days. It is a fix for one evening, not a strategy.
- Buy smooth. Deep texture holds sweat and residue against skin.
The short version
Ignore the word hypoallergenic. Look at what the piece is made of, and if you have a real allergy, look for a nickel-release figure.
Most people with mildly sensitive skin do well with gold-plated stainless steel, because the gold is inert, the steel underneath releases very little nickel, and there is no copper in it to stain. People with a diagnosed nickel allergy should buy titanium for anything that goes through skin, and should be sceptical of white gold no matter what it costs. And if your skin is going green rather than red, that is not an allergy — that is a brass piece telling you the truth about itself.
The differences between the three main jewelry metals, including how each behaves against skin, are laid out side by side in stainless steel vs gold vs silver.
Start small and see how your skin does. A single pair of earrings from the Lynnify shop is the low-risk way to test a new material on yourself — and if it does not agree with you, the returns policy is straightforward.
Frequently asked questions
Is stainless steel hypoallergenic? It is well tolerated by most people, but it is not nickel-free — 316L contains nickel within the alloy. The nickel is locked into the crystal structure, so very little is released onto skin, which is why most people wear it without any reaction. If you have a confirmed nickel allergy, look for a stated nickel-release test result rather than the word hypoallergenic.
Why does my skin turn green under a ring? That is not an allergy. Green marks come from copper in the metal reacting with sweat, forming copper salts that stain skin. It is harmless, it washes off, and it tells you the piece is brass or a copper alloy rather than stainless steel. An allergic reaction looks different — redness, itching, sometimes small blisters.
Does gold plating stop a nickel reaction? While the plating is intact, yes — gold is inert and acts as a physical barrier between the alloy and your skin. The caveat is that plating wears at contact points over months or years, and once the base metal is exposed, the barrier is gone at exactly the spot that touches you most.
What metal should I get a new piercing in? Implant-grade titanium, or 14K–18K gold. A fresh piercing is an open wound with far more metal-to-tissue contact than an earlobe that healed years ago, and it is the worst possible moment to introduce a new sensitivity. Save the decorative plated pieces for after it has fully healed.