Acne Scars In Darker Skin

Treating Acne Scar in Darker Skin; At A Glance

  • Best Results3-6+ treatments
  • Treatment Recovery5-6 days
  • Procedure Time5-40 min
  • Skin SpecialistNurse, Davin Lim
  • Duration of ResultsPermanent
  • AnaestheticNumbing
  • Back to Work1-5 days
  • Cost$-$$$

Acne Scars In Darker Skin

Acne scar treatments in darker skin patients pose unique challenges as skin of colour reacts differently compared to lighter skin. Hyperpigmentation is common, & in most cases, part of the healing up process. Precise peel concentrations & lasers will decrease unwanted side effects.

FactsFacts On Treating Acne Scars in Darker Skin

  • The biology of ethnic skin is different compared to lighter skin types
  • Skin pigment production namely melanogenesis is more brisk in ethnics
  • Additionally collagen remodelling cells called fibroblasts are more active
  • Parameters & devices selection is important to mitigate side effects
  • Pico lasers, insulated RFM & correct methods are required to give good & safe results
  • Scar revision may take a little longer in ethnic skin types based upon the above factors

Why is acne scar revision in darker skin different?

The biology of darker skin types is unique. Ethnic patients naturally have more melanin or pigment. Any breach of the upper layers of skin, whether it be lasers, microneedling, peels, surgery or energy devices, has the potential to produce more pigment. This is called post inflammatory hyperpigmentation or PIH. It is thus important to predict the duration of PIH, & importantly find solutions to mitigate or reduce the duration of PIH.

PIH is part of the healing process in this patient group. It can last 10 days all the way to 6 months or longer. Hence the aim of treatment is to balance out effective methods, but also decrease the duration of PIH.

The second factor in acne scar revision in ethnic skin types, is based around dermal responses, in particular the cells that produce collagen, namely the fibroblast. Darker skin patients have a brisk collagen response, hence why keloid & hypertrophic scars are more commonly encountered. Treatments must account for this biological response. This mitigates unwanted scarring.

What scar patterns are unique in darker skin patients?

Acnes scars are more severe in darker skin types due to several factors.

Firstly darker skin patients are more prone to scar patterns including fibrotic papular pebble stone scars on the nose, & chin. Additionally ice pick scars are more common.

Secondly it has to do with optimal transmission & reflectance of light. Darker skin absorbs light, lighter skin reflects. That is why dents on a white car door are less noticeable than on a dark car door. The darker the skin type, the more noticeable scars are. Volume deficits may be equal but perception changes with direct & strong lighting. Tangential lightning however takes away the colour bias.

What procedures are best for darker skin types with acne scars?

Acne scar revision is still performed in similar ways, bar two exceptions-

Firstly fully ablative laser resurfacing has to be performed in caution. I do employ both CO2 & erbium lasers, but the depth has to be shallower in darker skin, otherwise PIH may be long lasting. Post inflammatory hypopigmentation (loss of colour) is even more disturbing.

Secondly deep focal & segmental peels require a more conservative approach- once again it is hypo not hyperpigmentation that is more serious

All other revision methods including fractional laser, microneedling, excision, punch excision, elevation, dermal grafting, surgical subcision, RFM, dermarolling & pigment specific lasers apply, albeit different settings.

Why is insulated microneedling important in darker skin patients?

At Cutis we mainly use energy based microneedling as this remodels collagen better than normal non energy based systems like Skin Pen & Dermapen.

Energy based microneedling (also called RFM or radiofrequency microneedling), can be classed as insulated or non-insulated needling. Insulation is paramount for increased safety in darker skin patients. Examples of insulated RFM include Genius, Infini & Intracel RFM. Insulation protects the upper parts of skin known as the epidermis, whilst allowing controlled heating of the dermal layers of skin, where scars reside.

Davin’s Viewpoint on treating Acne Scars In Darker Skin

The fundamentals of acne scar revision still apply to darker – ethnic skin, namely applying a method to revise the pattern of scarring. It is just the execution of principles that may differ when treating skin of colour. As a rule, for skin type 3+ or darker, expect  transient skin colour changes, namely hyperpigmentation. Essentially patients trade up, namely trading deep scars for temporary hyperpigmentation that will fade over a period or weeks. No trade? Still can be done, but it may take two, three or even five times as long.

For darker skin patients, I still perform CO2, erbium & deep peels. I do however adjust the parameters – namely less passes, short pulse duration, lower density, longer wavelength (esp for pigmentation). Pico lasers are handy for PIH however they do not give good results for atrophic scars.

The flip side of ethnic skin? A more vigorous fibroblastic response biased in ethnics, can give accelerated results, especially for deep tethered scars, providing of course, background inflammation is quiescent. This means absolute control of background acne.

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