Hairmetry
Microneedle Stamp
An adjustable titanium stamp for your scalp routine
€22.95 incl. VAT
- straight hair
- wavy hair
- curly hair
- coily hair
- oily scalp
- balanced scalp
- dry scalp
Free shipping from €49. Free gift from €59.
- How often
- Once a week to start, never daily
- You notice it
- At once. Stop if it hurts
What to know
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Adjustable titanium needles, 0.25 to 3.0 mm
Needles 0.25 to 3.0 mm, set with a twist collar; 140 needles per head
A 2021 safety review lists metal allergy as a risk. Clinic needles run 0.5 to 3 mm, so the higher settings are for professionals.
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Depth: start at the lowest setting
Crown ultrasound put the top two skin layers at about 1.6 mm. Clinic scalp studies used 0.5 to 2.5 mm, often to pinpoint bleeding. Stay at 0.25 mm at home.
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Stamp: straight in, straight out
A review of 51 papers found tram-track marks (lines from dragging needles) with rollers, none in the one stamp study. Stamp data are few.
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Short-lived redness is expected
Reviews of skin needling describe mostly redness, pain and swelling that pass, with rare allergic and inflammatory reactions. Treat anything beyond mild pink skin as a reason to stop.
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Clean, personal, replaced
Single cases: chickenpox spread by a home roller, and a deep scalp infection after home dermarolling. No study tested home cleaning, so clean every time, never share it.
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Nothing on freshly needled skin
Lumps (granulomas) and body-wide reactions followed needling combined with a cosmetic serum in a published case series. Apply nothing to the skin straight after using the stamp.
How to use it
- 1Set the twist collar to 0.25 mm, the lowest setting, and stay there.
- 2Clean, calm, unbroken skin only. Skip any cut, sore or red spot.
- 3Clean the head as the pack says and let it dry fully.
- 4Press straight down and lift straight up. Never drag or roll it.
- 5Use light pressure, a few presses per area, and stop at mild pink skin.
- 6Put nothing on the skin after. Clean the head, reset to 0.25 mm.
Frequently asked
How often can I use it?
Start with once a week. Daily use has not been studied, and a published case report links daily needling of one spot to a skin growth, though a single case cannot prove cause. Skip a session if your skin is still pink or sore. If you are unsure, talk to a doctor.
How do I clean it?
Clean the head before and after every use as described on the pack, let it dry fully, and store it covered. Never share it. No study has tested home cleaning methods, so treat this as strict hygiene, not a guarantee. A deep infection after home needling has been reported.
How do I choose a depth?
The twist collar sets the needle length from 0.25 mm to 3.0 mm; it is a cosmetic tool, not a medical device. At home, start at the lowest setting, 0.25 mm, and stay there. For scale, ultrasound of the crown measured the outer two skin layers (epidermis and dermis) at about 1.6 mm and the whole scalp at roughly 5 mm. Scalp studies in clinics used needles of about 0.5 to 2.5 mm, handled by or under clinicians, and several aimed for pinpoint bleeding. Bleeding raises the risks reported for needling: infection, bruising, lasting dark marks, tram-track scarring (lines left by dragging needles or heavy pressure), and lumps called granulomas when a product goes on straight afterwards. So treat settings above about 0.5 mm as a professional's depth and ask a doctor first; that cutoff is our own cautious rule, not a studied figure. Never go deeper on irritated, sore or broken skin. After use, clean the head and turn the collar back to the lowest setting.
Can I use it with my scalp serum?
Not on the same day, and never straight after stamping. A published case series reports lumps and body-wide reactions after needling combined with a cosmetic serum, and needled skin can take up more of what you put on it. If your doctor prescribed something for your scalp, ask them before combining it with any needling.
When should I replace it?
Swap the head at once if a needle looks bent, dull or discoloured, or after 12 uses, whichever comes first. The 12-use limit is our own cautious rule, not a studied figure.
Who should not use it?
Anyone under 18, and anyone with cut, sore, irritated or infected skin, a metal allergy, keloid-prone skin, or who takes blood-thinning medication. If you have a skin or scalp condition, talk to a doctor first. It is not medicine and does not treat disease.
Microneedle Stamp
All studies behind this product (9)
Chu S et al. Safety profile for microneedling: a systematic review. Dermatol Surg. 2021
Tested: microneedling
Result: Common effects were redness, pain and pinpoint bleeding; infection, metal allergy and darker skin raise the risk of complications.
Read the study ↗Gowda A et al. A Systematic Review Examining the Potential Adverse Effects of Microneedling. J Clin Aesthet Dermatol. 2021
Tested: microneedling with needles of about 0.5 to 3 mm
Result: Whatever the device, side effects were mostly redness, pain, swelling and short-lived irritation. Very few reports covered stamps. Tram-track marks were reported with rollers, none in the one stamp study. A home roller user spread chickenpox from chest to face.
Read the study ↗Bonati LM et al. Microneedling in All Skin Types: A Review. J Drugs Dermatol. 2017
Result: Side effects were mild and short-lived, with isolated reports of tram-track marks, facial allergic granuloma and whole-body hypersensitivity. The authors asked for more blinded trials.
Read the study ↗Jain R et al. Subpericranial and epidural abscess with skull osteomyelitis as a complication of microneedling for alopecia: a singular case report. Surg Neurol Int. 2026
Tested: home microneedling
Result: Abscess under the scalp membrane with skull-bone infection.
Read the study ↗Soltani-Arabshahi R et al. Facial allergic granulomatous reaction and systemic hypersensitivity associated with microneedle therapy for skin rejuvenation. JAMA Dermatol. 2014
Tested: microneedling with a cosmetic serum
Result: Foreign-body granulomas and hypersensitivity followed use of the serum.
Read the study ↗Li L et al. High-frequency ultrasonography of the scalp: A comparison between androgenetic alopecia and healthy volunteers. Skin Res Technol. 2024
Result: The epidermis plus dermis measured about 1.6 mm at the crown (1.56 to 1.61 mm across the groups, no significant group difference). The whole scalp, down to the skull, was about 4.6 to 5.8 mm.
Read the study ↗English RS Jr et al. Microneedling and Its Use in Hair Loss Disorders: A Systematic Review. Dermatol Ther (Heidelb). 2022
Tested: needles of 0.25 to 2.5 mm (average 1.39 mm); rollers, pens and one stamp
Result: Studies were mostly done by clinicians. Session endpoints were often pinpoint bleeding or hemorrhage in the trials with longer needles. No serious adverse events were reported, but study quality was low. Used here only for the depths and endpoints, not for outcomes.
Read the study ↗Laurent A et al. Echographic measurement of skin thickness in adults by high frequency ultrasound to assess the appropriate microneedle length for intradermal delivery of vaccines. Vaccine. 2007
Result: Epidermis plus dermis was 1.55 to 2.54 mm thick depending on the body site, so a 1.5 mm needle inserted straight in reaches the dermis. Body sites, not scalp.
Read the study ↗Jaiswal S et al. Microneedling in Dermatology: A Comprehensive Review of Applications, Techniques, and Outcomes. Cureus. 2024
Result: Microneedling mainly targets the dermis. Active skin infection and a history of keloid scarring are listed as reasons for caution, and home rollers need proper cleaning to prevent infection.
Read the study ↗