Author: Dr Cal Shields MBChB LLM MPhil MRCS (ENT) | Longevity and Aesthetics Doctor
The Science of Microneedling
Creating tiny wounds to improve your skin sounds odd. Yet microneedling, also known as Collagen Induction Therapy, has become one of the most popular skin rejuvenation treatments available. The reason is simple: it works by triggering your body’s natural healing response.
Understanding the science behind microneedling explains why those controlled micro-injuries lead to firmer, smoother, more youthful-looking skin.
The Wound Healing Cascade
Microneedling uses fine needles to create controlled micro-injuries in the skin, typically at depths of 0.5-2.5mm depending on the treatment area and concern being addressed. These tiny punctures trigger a three-phase biological response that your body uses to repair tissue damage.
Phase 1: Inflammation
The moment the skin is punctured, an immediate inflammatory response begins. Blood platelets gather at the injury sites and release growth factors, which are signalling molecules that attract immune cells to begin the repair process. These growth factors are chemical messengers that tell your body to start healing. This phase typically lasts for the first few days after treatment and is responsible for the mild redness you may experience.
Phase 2: Proliferation
During the proliferation phase, specialised cells called fibroblasts become active. Fibroblasts are the workhorses of skin repair. They produce new collagen and elastin fibres, the proteins that give skin its structure and elasticity. Collagen is what makes skin firm, while elastin allows it to stretch and bounce back. This phase also involves neo-vascularisation, the formation of new blood vessels that ensure adequate nutrient supply to the healing tissue. More blood vessels mean more oxygen and nutrients can reach the skin to support the healing process.
Phase 3: Remodelling
The remodelling phase is where visible improvements become apparent. The newly formed collagen network strengthens and reorganises, making the skin firmer and more resilient. This phase continues for months after treatment, which is why results develop gradually rather than appearing immediately. Your skin is literally rebuilding itself from the inside out.
Collagen Induction: The Clinical Evidence
The most significant outcome of microneedling is collagen induction, which is why the treatment is formally known as Collagen Induction Therapy.
A comprehensive review in the Indian Journal of Dermatology documented that microneedling can produce up to a 400% increase in collagen and elastin deposition at six months post-treatment. Histological analysis (studying tissue samples under a microscope) revealed neocollagenesis (new collagen formation) at depths of 5-600 micrometres beneath the skin surface. Neocollagenesis simply means the creation of new collagen where it was previously broken down or absent.
The treatment stimulates production of multiple collagen types (I, III, and VII) as well as elastin and tropoelastin. Importantly, the new collagen forms in a normal lattice pattern rather than the parallel bundles characteristic of scar tissue. This structural difference is what allows microneedling to improve existing scars while creating smoother, healthier skin. Normal collagen is organised in a criss-cross pattern that gives skin strength and flexibility, whilst scar tissue collagen forms in straight lines that are less flexible.
A 2024 comprehensive review confirmed these findings, noting that microneedling stimulates fibroblast activity and increases collagen and elastin production, the proteins essential for maintaining skin elasticity and firmness.
Treatment Protocol and Results
Standard microneedling protocols typically involve 4-6 sessions spaced four weeks apart. This interval allows each round of collagen remodelling to complete before the next treatment. Your skin needs time between sessions to complete the healing process.
A clinical study evaluating automated microneedling found that four treatments spaced four weeks apart significantly improved the appearance of facial acne scarring. Results develop gradually over the weeks and months following treatment, with peak improvement typically observed around six months post-treatment. This gradual improvement occurs because collagen production continues long after the initial treatment.
The benefits of a complete treatment course can last 12 months or longer. Many patients choose maintenance sessions once or twice yearly to sustain their results and continue supporting healthy collagen production.
What Microneedling Treats
The versatility of microneedling comes from its ability to stimulate the skin’s own repair mechanisms. Common applications include:
Skin texture and tone – By promoting cell turnover and collagen production, microneedling refines overall skin texture and creates a more even complexion. Cell turnover means old, damaged skin cells are replaced by new, healthy ones.
Fine lines and wrinkles – The boost in collagen naturally plumps and firms the skin, reducing the appearance of fine lines. More collagen means thicker, stronger skin that resists wrinkling.
Acne scars and surgical scars – Breaking down scar tissue and promoting normal collagen formation helps reduce visible scarring. The treatment essentially remodels the scar tissue into healthier skin.
Hyperpigmentation – The treatment encourages skin repair and restoration, helping to lighten dark spots and sun damage. Hyperpigmentation refers to areas where the skin produces too much melanin, creating darker patches.
Enlarged pores – Strengthening and tightening the skin reduces the appearance of enlarged pores. As collagen production increases, the skin around pores contracts, making them appear smaller.
Enhanced product absorption – The micro-channels created during treatment temporarily allow serums and topical products to penetrate deeper into the skin, significantly improving their effectiveness. Products can reach deeper layers where they can have more impact.
Safety Profile
A 2025 narrative review examining the physiological mechanisms of microneedling confirmed that it is a minimally invasive procedure with low risk of post-procedural hyperpigmentation, scarring, or other adverse effects. The treatment is suitable for various skin types and has minimal downtime compared to more aggressive resurfacing procedures. Most patients experience mild redness for 24-48 hours before their skin returns to normal.
Why Choose Thriyv for Microneedling in Manchester
At Thriyv, we use the SkinPen, one of the most advanced microneedling devices on the market. The SkinPen is FDA-cleared and offers precise needle depth control, allowing our practitioners to tailor each treatment to your specific skin concerns. This precision matters because different skin issues require different treatment depths.
Our trained practitioners assess your skin before creating a personalised treatment plan. We do not offer one-size-fits-all approaches. Microneedling can be recommended as a standalone treatment or as part of a comprehensive skin programme, depending on your goals and skin condition.
Our Manchester clinic specialises in skin rejuvenation, combining advanced technology with evidence-based protocols. We stay current with the latest research and clinical best practices to ensure you receive safe, effective treatments. Our team has extensive experience with microneedling across different skin types and concerns, from acne scarring to ageing skin.
We also provide thorough aftercare guidance to support your skin’s healing process and maximise your results. Proper aftercare is essential to achieving the best outcomes and preventing complications.
Conclusion
Microneedling works by harnessing your body’s natural healing response. The controlled micro-injuries trigger a cascade of biological processes that result in increased collagen and elastin production, the proteins that keep skin firm and elastic.
Clinical evidence supports significant improvements in skin quality, with studies documenting up to 400% increases in collagen at six months post-treatment. The treatment is safe, effective, and requires minimal downtime compared to more invasive procedures.
If you are considering microneedling, book a consultation at Thriyv to discuss whether it is right for your skin. Our Manchester-based practitioners will assess your concerns and create a personalised treatment plan based on clinical evidence and your individual goals.
Don’t just live – Thriyv
