Contribution:​ Chen Baoqing, Hair Disorders Clinic, Department of Dermatology, Shenzhen Traditional Chinese Medicine Hospital

Scientific Guidance:​ Qian Fang, Department of Dermatology, Shenzhen Traditional Chinese Medicine Hospital

Every morning, a handful of hair scattered across the pillow; the shower drain clogged with strands after washing; a small clump comes away with every pass of the comb… Looking in the mirror, the part line keeps widening, the hairline is quietly receding, and the hair on top has become so thin that the scalp is faintly visible underneath. If you are experiencing any of these, don't panic - you are not alone in this "suddenly bald" anxiety.

According to the White Paper on Scalp Health of the Chinese People, the number of people affected by hair loss in China has exceeded 250 million, meaning approximately 1 in every 6 individuals is dealing with some degree of hair loss. Alarmingly, the condition is showing a clear trend toward younger age groups. Faced with thinning hair, many people have tried rubbing ginger on the scalp, using various anti-hair-loss shampoos, or even folk remedies - yet the results are often negligible. In recent years, an emerging treatment known as "scalp microneedling therapy"​ has gradually entered the public eye and become a rising star in the field of hair loss treatment.

So, what exactly is scalp microneedling therapy? Is it truly effective? Who is a suitable candidate? Today, the Hair Disorders Clinic of the Dermatology Department at Shenzhen Traditional Chinese Medicine Hospital brings you a comprehensive, in-depth scientific explanation.

1. What Is Scalp Microneedling Therapy?

Scalp microneedling therapy, also known as microneedling-assisted transdermal delivery, is a physical penetration-enhancing technique that uses an array of ultrafine needles to create controlled micro-injuries on the surface of the scalp. The underlying principle is both straightforward and remarkably clever -

During the procedure, a physician uses a medical-grade microneedling roller or an electric microneedling pen with needle lengths typically ranging from 0.5 mm to 2.0 mm. The device is gently rolled or stamped across the scalp in areas of hair loss. These hair-thin needles create thousands of microscopic channels in the scalp's stratum corneum and epidermis - each channel measuring only about 0.07 mm in diameter. These channels close on their own within a few hours without leaving scars.

But the real magic lies in the cascade of biological responses triggered by these "micro-channels":

1. Awakening "Sleeping" Hair Follicles - Activating Endogenous Repair Mechanisms

The micro-injuries kick-start a local wound-healing cascade response in the scalp: keratin rapidly aggregates, and platelets at the injury site become activated, releasing a variety of growth factors - including VEGF (Vascular Endothelial Growth Factor), PDGF (Platelet-Derived Growth Factor), and FGF (Fibroblast Growth Factor). These growth factors act like a "starting gun," capable of:

Promoting neovascularization, improving microcirculation around hair follicles, and delivering more abundant oxygen and nutrients to the follicles;

Activating hair follicle stem cells, prompting follicles that are stuck in the telogen (resting) phase to re-enter the anagen (growth) phase;

Extending the hair growth cycle​ and shortening the catagen (transition) phase, thereby reversing the hair loss process at the cycle level.

2. Opening the "Absorption Gateway" - Dramatically Enhancing Drug Penetration Efficiency

This is arguably the most clinically valuable aspect of microneedling therapy. Many people may have had this experience: after applying minoxidil, the scalp feels greasy, yet the results seem underwhelming. The reason is that the healthy scalp's stratum corneum acts as a dense "brick-and-mortar" barrier. The transdermal absorption rate of conventional topical medications (such as minoxidil solution or hair growth serums) is typically less than 5%.

The micro-channels created by microneedling directly bypass the stratum corneum barrier, increasing the absorption rate of topical drugs by dozens to even hundreds of times. The medication reaches the hair follicle roots directly - with higher concentration, faster onset, and lower required dosage. At the same time, microneedling can be combined with the delivery of peptides, stem cell-derived exosomes, Platelet-Rich Plasma (PRP), and other active ingredients, achieving a synergistic "1+1 > 2" hair regrowth effect.

3. Improving the Scalp Microenvironment - Oil Control, Anti-Inflammation, and Hair Loss Prevention

The mechanical stimulation of microneedling also helps regulate sebaceous gland secretion on the scalp, improving excessive oiliness. It promotes the clearance of local metabolic waste and reduces perifollicular inflammatory infiltration. For patients with androgenetic alopecia (seborrheic alopecia), this triple-action mechanism of "oil control + penetration enhancement + follicular activation"​ is precisely what makes microneedling superior to single-drug therapy.

2. Who Is Suitable for Microneedling Therapy?

Not all types of hair loss are suitable for microneedling treatment. Based on the clinical experience of the Dermatology Department at Shenzhen Traditional Chinese Medicine Hospital, the following groups are ideal candidates:

⚠️ The following conditions are temporary contraindications for microneedling:

Active scalp infection (such as folliculitis, furuncles, herpes zoster, etc.)

Coagulation disorders or current use of anticoagulant medications

Keloid-prone (hypertrophic scarring) constitution

Unhealed scalp wounds or skin lesions

Pregnant or breastfeeding women (recommended to wait until the postpartum stabilization period for evaluation)

3. Treatment Protocol & Course: Hair Regrowth Is a "Marathon"

Many patients, after their first microneedling session, notice a few extra hairs shedding and panic: "Am I going bald faster?"- Rest assured, this is a completely normal reaction.

Microneedling accelerates the shedding of "withered" hairs that are already at the late catagen stage, making room for new, healthy hair to grow. In medical terms, this is called the "exogen release effect."​ It's like mowing a lawn - trimming away the yellow, dead grass allows fresh green shoots to flourish.

Standard Treatment Protocol

Treatment Frequency:​ Once a week (interval may be adjusted based on individual scalp tolerance)

Course Duration:​ 12 sessions constitute one standard treatment course

Time to Visible Results:​ Typically, at least 3 consecutive months of treatment are required before initial vellus hair regrowth and reduced shedding can be observed

Maintenance Phase:​ After visible results, it is recommended to continue maintenance treatment at 1–2 times per month for 6–12 months to consolidate the therapeutic effect

Why does hair regrowth take so long?​ Because hair growth follows inherent biological laws - a complete hair cycle (anagen → catagen → telogen) takes a minimum of 2 to 6 years. Microneedling therapy works by "accelerating" and "optimizing" this cycle, but it cannot defy physiological laws and produce overnight results. Patience is the most important "medicine" on your hair regrowth journey.

4. Pre- & Post-Treatment Care - Details Determine the Outcome

🔹 Pre-Treatment Preparation

🔹 Post-Treatment Care

5. Microneedling vs. Traditional Treatment: A Comparative Overview

6. Final Thoughts: Scientific Hair Regrowth, Reject the Anxiety

Although hair loss is not life-threatening, it has a very real impact on a person's self-confidence and quality of life. The biggest mistake one can make when facing hair loss is "grasping at straws" - blindly using folk remedies not only wastes money but may also delay the optimal window for treatment, allowing salvageable hair follicles to completely atrophy and close.

As a safe, minimally invasive, and highly effective adjunctive hair regrowth method, scalp microneedling therapy offers a new and worthwhile option for those struggling with hair loss. However, it must be emphasized that microneedling therapy should be performed under the guidance of a professional dermatologist. A thorough diagnosis of the hair loss type and underlying cause is essential before formulating a personalized, combination treatment plan.

The Hair Disorders Clinic of the Dermatology Department at Shenzhen Traditional Chinese Medicine Hospital is staffed by an experienced professional team equipped with advanced microneedling devices. Combined with TCM-based syndrome differentiation and treatment (such as internal herbal medicine, plum-blossom needle tapping, and scalp herbal steaming), the clinic tailors comprehensive treatment plans for every patient.

If you are troubled by hair loss, consider coming in for a professional trichoscopy (hair and scalp examination). Let our doctors assess whether microneedling therapy is right for you. Remember - hair follicle atrophy is irreversible. The earlier the intervention, the greater the hope of saving your hair.