Most people know microneedling as a skin treatment for texture and collagen. Over the last few years it has also gained attention for thinning hair. There is a lot of hype around it as a fix for hair loss, so it helps to separate the marketing from the evidence. This article looks at how microneedling is meant to work on the scalp and what the research actually shows. It also covers how home and professional approaches differ and where it sits alongside the treatments that do most of the work in hair loss.
What is Microneedling?
Microneedling, also known as collagen induction therapy, is a cosmetic procedure that uses tiny needles to create controlled micro-injuries in the skin. These micro-injuries trigger the body’s natural healing response, which increases collagen and elastin production. On the scalp the same process is thought to stimulate dormant follicles. This is why researchers have explored it as a treatment for thinning and hair loss.
There are broadly two types of scalp microneedling, and the difference between them matters for both safety and results.
- Professional microneedling uses specialised devices with longer needles (1.0 to 2.5 mm) that penetrate more deeply into the scalp. This is the more effective approach, particularly when paired with treatments like minoxidil or platelet-rich plasma. Only trained medical professionals should carry it out, working under sterile conditions to reduce the risk of infection or injury.
- Home microneedling uses dermarollers with shorter needles (0.25 to 0.5 mm). The shorter needles make these devices less effective but safer for unsupervised use, so results tend to be more subtle. Improper use still carries a real risk of scalp irritation or infection, which is why it is worth getting advice before starting.
How is Microneedling Meant to Help Hair Growth?
The theory is that controlled micro-injuries on the scalp prompt a healing response that supports healthier follicles. The same injuries also increase local blood flow, which may bring more nutrients to the follicles. The tiny channels they create can help topical treatments absorb too. Taken together, these are the mechanisms most often put forward for how microneedling might help with hair loss.
- Stimulating the follicles: The controlled micro-injuries are thought to reactivate dormant follicles and encourage new growth.
- Increasing blood flow: More circulation to the scalp may bring additional nutrients and growth factors to the follicles.
- Improving absorption: The micro-channels can help topical treatments like minoxidil penetrate more deeply, which may make them more effective.
- Low downtime: Compared with more invasive options, microneedling involves relatively little downtime and few side effects.
- Early-stage thinning: It appears most useful for people in the earlier stages of hair thinning rather than advanced loss.
What Does the Evidence Say?
There is a reasonable body of research behind microneedling for hair, though it comes with caveats. Studies suggest it has potential for androgenetic alopecia. Several reviews also report regrowth in both androgenetic alopecia and alopecia areata, usually when microneedling is paired with minoxidil or platelet-rich plasma (PRP). We do not fully understand the mechanism. Microneedling is thought to create micro-channels in the scalp that improve absorption of topicals whilst stimulating follicles and circulation.
The important detail is where that evidence is strongest. The evidence convinces most for early-stage thinning, and almost always when microneedling sits alongside another therapy rather than working on its own. Results also vary considerably between individuals, and most studies are small. As such, microneedling is better understood as something that supports proven treatments than as a standalone answer to hair loss.
What to Expect from Professional Microneedling
If you are considering professional microneedling for hair, it helps to set realistic expectations. Most people need several sessions to notice a difference. The number depends on how extensive the hair loss is and how well someone responds. A licensed professional should always perform it, which keeps the risk of injury or infection low.
A typical session lasts 30 to 60 minutes. The practitioner cleanses the scalp first to remove dirt, oil and product. A topical numbing cream sometimes goes on to reduce discomfort. The practitioner then passes the device over the scalp in several directions to cover it evenly. This may feel mildly uncomfortable, though most people tolerate it well.
Sessions are usually 4 to 6 weeks apart so the scalp can heal. Many people need 4 to 8 sessions before they see results. Some redness or sensitivity afterwards is normal and usually settles within a day or two. It is best to avoid washing the hair for 24 hours. Keep away from harsh hair products, direct sunlight and strenuous exercise for a few days too. A soothing, alcohol-free serum or moisturiser can help calm the scalp, and many practitioners pair the treatment with a topical to enhance the effect.
Can You Microneedle Your Scalp at Home?
There are plenty of at-home microneedling devices for hair, but they come with trade-offs. The needles are shorter than professional ones, so they are less effective. Improper use can also cause scalp irritation, infection or even worsen hair loss. Because of this, it is worth speaking to a hair loss specialist before you start, so your technique is safe and as effective as possible.
If you do go ahead at home, a few principles reduce the risks.
- Choose the right device: Pick a device designed for home use, with needle lengths of 0.25 to 0.5 mm. Longer needles carry a much higher risk of injury.
- Cleanse your scalp: Wash your hair and scalp thoroughly with a gentle shampoo first to remove dirt, oil and product and lower the risk of infection.
- Sanitise the device: Soak the dermaroller in 70% isopropyl alcohol for around 10 minutes beforehand so the needles are sterile.
- Section your hair: Divide the hair into sections so you can reach the scalp easily and cover it evenly.
- Apply a topical if advised: If you use a topical like minoxidil, applying it around the same time can take advantage of the improved absorption microneedling offers.
- Use light pressure: Roll gently over each area a few times in different directions, without pressing hard, to avoid injuring the scalp.
- Clean and dry the device: Soak it in alcohol again afterwards and let it air dry before storing it.
- Soothe the scalp: Follow with an alcohol-free serum, oil or moisturiser to reduce redness and support healing.
- Avoid harsh products and sun: For at least 24 hours afterwards, steer clear of harsh hair products and direct sunlight whilst the scalp recovers.
- Do not overdo it: limit at-home microneedling to once a week at most so the scalp can heal. Overuse can cause irritation or damage.
What are the Risks & Side Effects?
Microneedling can be safe in careful hands, but it still carries risks. The most common side effects are redness, swelling and sensitivity over the treated area, which usually settle within a few days. There is also an infection risk if the procedure is not sterile or aftercare is poor. Poor technique or the wrong device can lead to scarring or further hair loss.
It is not suitable for everyone. People with certain skin conditions such as eczema or psoriasis, active scalp infections, or a history of keloid scarring should avoid it. Those with more advanced hair loss, or underlying medical causes of thinning, may also see little benefit. This is why it is sensible to have your hair loss properly assessed before deciding whether microneedling or another approach is right for you.
What Treatments Work Best for Hair Loss?
For most people the treatments with the strongest evidence are medical ones. Microneedling tends to add the most value as a complement to these rather than a replacement. The main options to consider, alone or in combination, include the following.
- Over-the-counter treatments: Lower-strength topical minoxidil, available up to 5% without a prescription in the UK, is applied directly to the scalp to encourage growth.
- Prescription treatments: Topical or oral medicines such as spironolactone, finasteride and dutasteride target the hormonal driver behind androgenetic hair loss.
- Platelet-rich plasma (PRP): This involves concentrating the platelets from a small sample of your own blood and injecting them into the scalp to release growth factors.
- Low-level laser therapy (LLLT): A non-invasive treatment that uses red light to stimulate the follicles.
- Nutritional support: Where a deficiency drives the thinning, correcting levels of nutrients like biotin and vitamin D can support overall hair health.
- Hair transplant surgery: For advanced loss, a hair transplant moves follicles from a donor area into the thinning areas and can give lasting results when it works.
Microneedling can be a useful addition to a hair loss plan, particularly in early-stage thinning and when combined with proven topical treatments. It is not right for everyone, results vary from person to person, and it works best as one part of a broader approach. If you are losing hair, the most useful first step is a proper diagnosis so your treatment fits the cause.
We understand that hair loss is an intensely personal journey. This is why we created personalised hair loss and regrowth treatments through our online skin clinic. Our doctors treat hair loss with bespoke compounded treatments designed around you, using actives such as minoxidil, spironolactone and tretinoin where appropriate. We also treat skin concerns including acne, hyperpigmentation, melasma and skin ageing. Book a video consultation or start your online consultation today. Your journey towards great skin and hair starts here.
This article is intended for general informational purposes only and is not a substitute for medical advice, diagnosis or treatment. Always consult a qualified medical professional with any concerns about your hair or treatment options.
