Treating skin blemishes with microneedling combined with depigmenting actives is one of the most effective and well-established indications for this technique. The microchannels created by the dermapen allow melanogenesis-inhibiting agents to reach the basal keratinocytes and melanocytes where pigment is produced directly, overcoming the penetration limitation of conventional topical application.

Types of blemishes treatable with microneedling

Melasma

Melasma is a chronic acquired hyperpigmentation with symmetrical distribution, predominantly in sun-exposed areas (forehead, cheeks, upper lip). It is more common in women and is influenced by hormonal factors (pregnancy, contraceptives) and UV radiation. There are two types according to pigment depth:

Post-inflammatory hyperpigmentation (PIH)

The result of melanocyte overactivation in response to an inflammatory process (acne, burn, injury). Pigment depth determines treatment response. Superficial PIH responds very well to superficial microneedling (0.5–1.0 mm) with depigmenting actives.

Sunspots (solar lentigines)

Solar or actinic lentigines are localised hyperpigmentation spots caused by chronic UV exposure. They respond well to microneedling combined with depigmenting actives, especially vitamin C and tranexamic acid.

Ephelides (freckles)

Freckles are diffuse hyperpigmentations due to irregular melanocyte distribution, with a genetic basis and solar activation. They respond partially to treatment; the genetic pattern makes them recurrent with sun exposure.

Mechanism of action of microneedling on blemishes

Microneedling acts on blemishes through several complementary mechanisms:

  1. Accelerated epidermal renewal: micro-injury speeds up the turnover of melanosome-laden keratinocytes, exporting accumulated pigment to the surface more rapidly.
  2. Melanocyte normalisation: the healing response can normalise the hypersecretory behaviour of melanocytes.
  3. Deep depigmentant penetration: microchannels deliver tyrosinase inhibitors to the exact level where melanogenesis occurs, increasing bioavailability up to 40-fold compared to topical application.

Recommended BCN actives for blemishes

BCN Lumen — Depigmenting peptides

BCN Lumen contains specific peptides that inhibit multiple steps of melanogenesis: the transfer of melanosomes from melanocytes to keratinocytes (MITF inhibition), tyrosinase synthesis and melanocyte proliferation. It is the treatment of choice for diffuse blemishes and melasma without the rebound hyperpigmentation risk posed by some traditional agents.

BCN Melano Cocktail

A multi-component formulation with synergistic depigmenting effect. It acts through several simultaneous mechanisms: tyrosinase inhibition, accelerated epidermal turnover and reduction of inflammation that triggers melanogenesis. Especially effective for epidermal melasma and recent PIH.

Vitamin C (BCN Classics)

Ascorbic acid is the most studied tyrosinase inhibitor. At concentrations of 10–20%, applied via microneedling at 0.5–1.0 mm depth, it significantly reduces melanin production. It also neutralises free radicals that would otherwise reactivate melanogenesis through the oxidative pathway.

Tranexamic acid

Tranexamic acid is one of the depigmenting agents with the strongest clinical evidence for melasma. It inhibits plasminogen binding to keratinocytes, reducing arachidonic acid and prostaglandin production that stimulate melanocytes. Its penetration via dermapen exponentially increases its efficacy. Available in the BCN range.

Specific protocol for blemishes

Treatment steps

  1. Cleansing and preparation with BCN Cleanser
  2. Application of the selected depigmenting active (BCN Lumen, Melano Cocktail or vitamin C) on the area to be treated
  3. Dermapen pass at 0.5–1.0 mm according to blemish depth (epidermal: 0.5 mm; dermal: 0.75–1.0 mm)
  4. Second application of the active and gentle massage until absorbed
  5. Application of BCN Heal or BCN Intense Repair as closure
  6. SPF 50 sun protection is essential upon completion

Number of sessions and frequency

Specific precautions for blemish treatment

Rigorous sun protection: The biggest mistake in treating blemishes with microneedling is not insisting enough on sun protection. Without daily SPF 50, results are transitory and the blemish may worsen. The professional must prescribe active photoprotection as part of the home protocol.

Dark phototypes (IV–VI): Reduce treatment aggressiveness (lower depth, longer intervals). The post-needling inflammatory response can activate melanogenesis in dark phototypes, worsening hyperpigmentation if not properly controlled. Always use anti-inflammatory actives in post-treatment.

Melasma: Melasma is a chronic condition with a tendency to relapse. The client must understand that treatment improves but does not permanently eliminate the predisposition. Photoprotection and periodic maintenance are essential.