Can You Get an MRI With Hair Extensions?

Whether you can safely get an MRI with hair extensions depends almost entirely on what materials are in them. Extensions attached with metal components, particularly the small metal microbeads (also called micro-rings) that clamp near the scalp, pose genuine safety risks inside an MRI scanner and may need to be removed before you can proceed. Extensions that are completely free of metal, such as those bonded with keratin or sewn in with thread alone, are generally not a problem. The trouble is that many people don’t realize their extensions contain metal at all, and MRI staff may not think to ask about them.

Why Metal and MRI Don’t Mix

An MRI machine uses powerful magnetic fields and bursts of radiofrequency energy to create images of the inside of your body. Any metal object in or near the scanner can interact with those forces in a few ways. Ferromagnetic metals (iron, nickel, cobalt, and certain alloys) can be pulled or torqued by the magnetic field, which is why patients are screened for things like surgical implants and loose metal objects before entering the room. But even non-ferromagnetic metals can absorb radiofrequency energy and heat up, sometimes enough to cause burns. This radiofrequency heating is actually the bigger concern with hair extensions.

Metallic items attached to the body during an MRI can cause skin irritation, swelling, and burns from radiofrequency energy absorption. When metal pieces are close together and connected by conductive material, they can form what engineers call a conductive loop, which concentrates that energy and amplifies the heating effect. Hair extensions with metallic microbeads create exactly this scenario: dozens or even hundreds of small metal pieces sitting against the scalp, connected by the extension strands themselves.¹

The Case That Illustrates the Problem

A published case report describes a patient who arrived for a cervical-spine MRI with metallic microbeads throughout her hair. The beads were crimped flat and hidden close to her scalp, making them invisible to the naked eye. X-rays taken during the screening process revealed numerous overlapping metallic microbeads that nobody had initially spotted. The patient could not safely undergo the MRI and had to have the beads professionally removed by a hairdresser before rescheduling the scan for a later date.¹

This case matters because it shows how easily metal in hair extensions can be missed. The microbeads were designed to blend in with the patient’s hair color, with an outer colored metallic layer and an inner silicone lining that allows them to be crimped tightly around the natural hair strand. They looked like part of the hair, not like metal objects. It took imaging to confirm they were there.

Which Types of Extensions Contain Metal

Not all hair extensions are built the same way, and the risk level varies dramatically depending on the attachment method. Here’s a practical breakdown:

Micro-ring or micro-bead extensions: These use small metal tubes that are clamped around the natural hair strand to hold the extension in place. They are the most clearly problematic type for MRI. The beads are typically made of an outer metallic layer over an inner silicone lining and sit right against the scalp.¹
Clip-in extensions: These use metal clips or snap-clips to grip onto hair. The clips are easy to see and easy to remove, so they pose a lower practical risk simply because you can take them out before entering the scanner room. But if you forget them, the metal clips carry the same RF heating concern.
Tape-in extensions: These use adhesive tape strips to sandwich thin sections of natural hair. Most tape-in extensions do not contain metal, but some brands use a thin foil or metallic adhesive layer. Check with the manufacturer or your stylist.
Keratin-bonded or fusion extensions: These use a keratin protein bond, melted with a heat tool, to attach the extension to the natural hair. When the bond itself is pure keratin and the extension hair is real or non-metallic synthetic, there is typically no metal involved. However, some lower-quality versions use metal-tipped bonds.
Sew-in weaves: Natural hair is braided into cornrows, and wefts of extension hair are sewn onto the braids with thread. If the thread and wefts contain no metal, this method is generally MRI-safe. Occasionally, metal clips or pins are used to secure loose ends, so it’s worth checking.

The underlying principle is simple: if there’s metal in your extensions, it’s a potential problem. If there’s genuinely no metal anywhere in the attachment system or the extension material itself, you’re likely fine. The challenge is that “no metal” is harder to verify than it sounds, because the metal components are sometimes hidden or very small.

Where You’re Being Scanned Matters

The risk from metallic extensions is highest when the metal sits inside or very near the area being scanned, because that’s where the radiofrequency energy is most concentrated. A patient with metal microbeads on her scalp who needs a brain or cervical-spine MRI has the worst-case setup: the metal is directly in the zone of radiofrequency excitation.¹

If you need an MRI of your knee or lower back, metal on your scalp is farther from the imaging zone, and the risk drops. But “lower risk” is not the same as “no risk.” MRI safety protocols are conservative for good reason: burns from RF heating are painful and entirely preventable. Most MRI facilities will still want to address any metal on your body regardless of where the scan is focused, because stray radiofrequency energy and the magnetic field itself extend well beyond the immediate imaging region.

Hair Products Add Another Layer of Concern

The metal in the attachment hardware is the primary concern, but it’s not the only one. The combination of synthetic hair fibers, hair sprays, gels, and metallic microbeads creates a particularly risky cocktail. Many hair sprays and styling gels are flammable, and if metal components overheat during an MRI, those flammable products sitting on top of or near the heated metal could make things worse.¹

Even without extensions, MRI technologists routinely ask patients to remove hair accessories and wash off heavy product. If you do have extensions that are cleared as metal-free, showing up with a head full of hairspray or gel is still not ideal. Wash your hair with a simple shampoo before the appointment if you can. This removes any product residue that might contain metallic particles (some volumizing powders and dry shampoos contain aluminum or iron oxide) and gives the technologist less to worry about.

What Happens at Your MRI Appointment

Before any MRI, you’ll fill out a safety screening questionnaire that asks about implants, metal fragments, and medical devices. Hair extensions are not always listed on these forms. If you have them, mention them proactively, even if nobody asks. Describe the type and, if possible, bring information from your stylist or the extension manufacturer about what materials are used.

The MRI technologist will make the call about whether your extensions are safe to scan with. If there’s any doubt about whether metal is present, the scan may be postponed. In the case described in the published report, the patient had to leave and come back after professional removal of the microbeads, which meant rebooking the appointment entirely.¹ That’s an outcome worth avoiding if you can, especially when the MRI is medically urgent.

If the technologist is uncertain, some facilities will do a quick handheld metal-detector sweep of your head or use a ferromagnetic detection system at the entrance to the scanner room. These tools pick up ferromagnetic metals well but may not catch every type of non-ferromagnetic conductor. X-rays can also reveal hidden metal, as they did in the published case, but ordering additional imaging just to check your hair adds time, cost, and radiation exposure that nobody wants.

Image Quality Is a Separate Issue

Even if safety weren’t a concern, metal in your hair can ruin the MRI images themselves. Metal creates artifacts, areas of signal distortion that show up as black voids, bright spots, or warping in the image. For a brain or head-and-neck MRI, metal microbeads scattered across the scalp would make the images difficult or impossible to interpret, defeating the purpose of the scan.

This matters even for metal that’s technically non-ferromagnetic and poses less of a safety threat. Titanium, for example, is considered relatively MRI-safe in many implant applications, but it still causes local image distortion. If your extensions contain any metal at all and you need a head or neck scan, the radiologist reading your images is going to have a hard time, and you may end up needing to repeat the scan after removal anyway. A systematic review of MRI safety literature notes that hair extensions can contain metals and should be treated with caution because they may create conditions for RF heating.¹

Planning Ahead if You Know an MRI Is Coming

If you have any advance notice that you’ll need an MRI, the single most useful thing you can do is figure out what’s in your extensions before the appointment. Call the salon that installed them or check the packaging if you did them yourself. What you’re looking for is the specific attachment method and whether any component is metal.

If your extensions do contain metal and you have time, having them professionally removed before the scan is the cleanest solution. Depending on the type, this might take an hour or several hours, and it’s not cheap. But compared to arriving at the MRI facility, being told you can’t proceed, and then having to reschedule both the removal and the scan, doing it in advance saves time and stress overall.

If removal isn’t possible on short notice, let the MRI scheduling office know when you book the appointment. They may be able to advise you in advance or flag the situation for the technologist. Some facilities have dealt with this before and have protocols in place; others may not have encountered it and will appreciate the heads-up.

For people who get extensions regularly and anticipate needing MRIs (for ongoing medical monitoring, for instance), choosing a metal-free extension method from the start eliminates the problem entirely. Sew-in weaves with no metal clips, keratin-bonded extensions with verified non-metallic tips, and tape-ins without foil layers are all options that avoid the MRI conflict.

Other Hidden Metal in Hair and on the Body

Hair extensions get most of the attention because of how much metal they can involve, but they’re not the only grooming-related MRI hazard that catches people off guard. Bobby pins, hair clips, and barrettes are obvious and easy to remove, but people sometimes forget about less visible items. Certain hair dyes, particularly dark reds and blacks, contain iron oxide pigments that can heat up under MRI conditions. Some eyelash extension adhesives contain metallic particles. Permanent makeup and certain tattoo inks contain metal oxides that can cause local irritation or mild heating during scans, though serious injuries from tattoo ink in MRI are rare.

The broader point is that the MRI screening process exists to catch all of these things, and being thorough and honest during that process protects you. If you’re unsure whether something on or in your body contains metal, say so. The technologist would rather spend five minutes investigating than deal with a burn or a ruined scan.

When Extensions Are Mistaken for Something Else on Imaging

An underappreciated problem is that metallic hair extension components can confuse radiologists looking at other imaging studies, not just MRI. If you have a CT scan or X-ray of your head, neck, or upper body, metal microbeads will show up as bright dots scattered across the scalp. Radiologists who aren’t aware of the extensions might initially wonder whether they’re looking at shrapnel fragments, surgical hardware, or some other foreign body. This isn’t a safety issue the way MRI is, but it can cause unnecessary alarm and follow-up testing if nobody mentions the extensions beforehand. The published case report’s X-ray images clearly showed numerous overlapping metallic microbeads that had been crimped flat, and recognizing what they were required some awareness that such products exist.¹

As hair extensions become more common and more diverse in their construction, medical professionals are gradually becoming more aware of them as a screening consideration. But awareness is uneven. A large urban hospital with a diverse patient population may encounter extensions routinely, while a smaller facility might not. Your own awareness of what’s in your hair and your willingness to bring it up remains the most reliable safeguard.

1
PubMed Central. Metallic microbeads for hair extensions: Hidden dangers for magnetic resonance imaging