Social media isn't always the best place to go to for beauty and skincare advice, but if you've seen the countless videos touting the benefits of using a derma roller for hair growth on your feed, you're probably wondering whether those seemingly miraculous results are actually legit.
The truth is, there are countless underlying reasons that could explain any hair loss or thinning. Before you try anything new like reaching for the derma roller, it's best to get to know the facts – and consult a doctor or trichologist if you're experiencing severe hair loss – but used correctly and for the right reasons, it can be really effective.
Best derma rollers for scalp in this article:
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“Derma rolling, also known as microneedling, involves using a device covered in very fine needles to create controlled micro-injuries in the scalp,” says Dr Nora Jaafar, dermatologist and aesthetic doctor. “These tiny punctures stimulate wound-healing pathways, increase blood flow and activate growth factors that can help support hair follicle activity.”
Sounds good, right? But of course, using any device that causes injury to the skin (however micro that might be) should be approached with caution – especially when you're trying it yourself at home. That's why I've consulted some of the best trichologists and dermatologists out there to share everything you need to know about derma rolling the scalp for hair growth, for the safest techniques and the best chance at great results.
Meet the experts:
- Dr Nora Jaafar, dermatologist and aesthetic doctor
- Natalia Souza, trichologist and founder of Reflect Hair
- Meet the experts
- What is derma rolling and how can it help with hair growth?
- How to use a derma roller for hair growth:
- Who does derma rolling for hair work best for?
- Which needle length derma roller is best for at-home use?
- Who should avoid using a derma roller on the scalp?
- What are the best treatments to combine with derma rolling for hair growth?
What is derma rolling and how can it help with hair growth?
A derma roller is a small roller device with tiny, fine needles on it, used to gently roll on the skin and create small punctures. “From a trichology perspective, the idea is that these tiny punctures stimulate the scalp’s natural wound-healing response, increasing growth factors, collagen production and blood supply around the follicle,” says Natalia.
“Research suggests this process may activate pathways involved in hair growth, which can prolong the growth (anagen) phase of the hair cycle.”
It's worth noting that derma rolling is generally most effective when combined with other treatments, however. “It is most effective as part of a broader hair-growth strategy rather than as a standalone treatment,” adds Dr Nora.
How to use a derma roller for hair growth:
- Prep the scalp. “Start with a clean scalp. Washing the hair beforehand helps remove oils, product build-up and bacteria that could otherwise be pushed into the skin,” says Dr Nora. You want to make sure the skin is dry before starting, too. “Avoid applying styling products beforehand,” she adds.
- Disinfect your derma roller. Whether it's your first use or not, it's best to fully disinfect your derma roller each time you use it. “The device should be disinfected before and after every use, typically by soaking the needle head in 70% isopropyl alcohol for several minutes and allowing it to air dry,” says Natalia. “The roller should never be shared, and the needles should be replaced regularly as they become blunt.”
- Choose to roll areas where hair is thinning, rather than the entire scalp. “Roll gently in multiple directions (vertically, horizontally and diagonally), lifting the roller between passes rather than dragging it across the skin. This helps ensure even stimulation while minimising unnecessary trauma to the scalp,” says Dr Nora. “Consistency is more important than intensity. Over-aggressive rolling can cause irritation without improving results.”
- Keep the pressure light. “The key is controlled pressure; the goal is to stimulate the scalp, not cause trauma or bleeding,” says Natalia.
- For strongest results, apply a targeted scalp serum to the areas you've derma rolled. “The micro-channels created by the needles enhance the penetration of topical therapies such as minoxidil, peptides or growth factor serums,” says Natalia. “Studies have shown that combining microneedling with minoxidil significantly increases hair count compared with using minoxidil alone.”
- Keep aftercare simple. “Avoid harsh products, heavy oils or heat styling immediately afterwards. Gentle cleansing and soothing scalp products can help support recovery," she adds. “It is also important to allow the scalp time to recover between sessions rather than repeating treatment too frequently.”
- Monitor the scalp afterwards. “Look out for excessive redness, swelling or signs of infection afterwards,” says Natalia – noting you should consult a medical professional if you have any concerns.
- If you have no adverse effects, repeat based on your needle length. “Frequency depends on needle length – shorter needles can be used weekly or twice weekly, while longer needles are typically used less frequently,” adds – though needles larger than 0.5mm are not advised for at-home use. “Consistency over several months is essential, as hair growth cycles are slow and visible results often take three to four months or longer.”
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Who does derma rolling for hair work best for?
“Derma rolling is most appropriate for individuals with early to moderate hair thinning, particularly androgenetic alopecia in men or women, where follicles are still present but miniaturising,” says Natalia. “There is also some emerging evidence that it may support treatment of conditions like alopecia areata or telogen effluvium, although the data is less robust.”
And while micro needling can stimulate growth factors and improve circulation around hair follicles – which may help support thicker, healthier hair strands – “it tends to work best when there is an underlying thinning process rather than simply trying to boost already healthy hair,” adds Dr Nora.
“If someone has naturally fine hair but no underlying scalp or follicle issue, derma rolling will not fundamentally change hair genetics,” adds Natalia. “In my clinical experience, it is most beneficial where there is early thinning or weakened follicles, rather than purely cosmetic thickening in completely healthy hair.”
Which needle length derma roller is best for at-home use?
“For home use, 0.2mm to 0.5mm needles are the safest and most appropriate,” says Natalia. Here's a quick guide:
- 0.2mm – 0.3mm derma rollers: Primarily increase transdermal absorption of topical treatments, with minimal impact on follicular stimulation. Since the stratum corneum (the outermost layer of the skin) acts as a natural barrier, micro-needling at this depth helps to temporarily increase permeability, allowing active ingredients to be better absorbed.
- 0.5mm derma rollers: Can provide some degree of stimulation to the scalp by increasing blood flow and activating mild inflammatory pathways, though it does not reach the deeper dermis where follicular stem cells are located.
In professional clinics, longer needles are often used to trigger significant regenerative responses, such as increased collagen production and the activation of growth factors. These should never be used at home due to the risk of infection, excessive inflammation, tissue damage and scarring. “Improper technique or excessive frequency of use can lead to micro-scarring, which may exacerbate hair loss rather than improve it,” adds Natalia.
Who should avoid using a derma roller on the scalp?
“Derma rolling should be avoided if the scalp has active infections, psoriasis, eczema, severe dandruff or open wounds, as micro-needling can worsen inflammation or spread infection,” says Dr Nora.
“It should also be avoided in people who are prone to keloid scarring or those taking blood-thinning medication,” adds Natalia. “In cases of advanced hair loss where follicles are already lost or replaced by scar tissue, derma rolling is unlikely to produce meaningful regrowth, as there is no viable follicle left to stimulate.”
What are the best treatments to combine with derma rolling for hair growth?
According to clinical studies, derma rolling on the scalp produces the best results when combined with the right topical treatments.
“It often works best when combined with other therapies," says Dr Nora. “There is clinical evidence suggesting derma rolling can improve results when used alongside treatments like topical minoxidil. Several studies have shown micro-needling can enhance hair density and thickness in people with androgenetic alopecia by improving product penetration and stimulating follicle regeneration.”
In professional clinics, you will also find scalp derma rolling combined with other more advanced therapies. “Derma rolling is frequently combined with regenerative treatments such as platelet-rich plasma (PRP), low-level laser therapy or targeted scalp serums. The rationale is that micro-needling acts as both a biological stimulant and a delivery enhancer, allowing active ingredients to reach the follicular environment more effectively,” adds Natalia.
