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LED vs Laser vs PDT for Acne in Melbourne

LED vs Laser vs PDT for Acne in Melbourne

A practical guide to choosing the right in-clinic technology — based on acne type, downtime, and evidence.

LED, laser and photodynamic therapy (PDT) can be helpful for acne, particularly when breakouts are persistent, inflammatory, or when you want to reduce reliance on oral medication. The medical literature also makes an important point: while many studies show benefit, protocols vary and high-quality comparative trials are still evolving. (1–3)

This page explains what each option does, who it suits best, and how we decide which pathway is most appropriate.

Book an Acne Consultation (Main cosmetic Automed booking page)

Acne Guides and Treatment Pathways

For service pages:

The Key Differences in One Sentence Each

LED: gentle anti-inflammatory and antibacterial support, best for mild–moderate inflammatory acne and sensitive skin. (4,5)
Nd:YAG laser (Fotona SP Dynamis): deeper-penetrating laser treatment used as an adjunct to reduce inflammation and support oil-gland modulation in selected acne patterns. (6–8)
PDT (ALA + red LED): the most intensive option; targets sebaceous activity and inflammation but has more downtime and requires strict light avoidance afterward. (9–11)

Which Option Is Right for You?

If you want the gentlest, lowest-downtime option

LED is often the best starting point, particularly if your acne is mild to moderate and inflammatory (red pimples) rather than deep nodules. Evidence supports benefit, and side effects are usually minimal. (4,5)

If you have persistent inflammatory acne and oily skin, and want a stronger in-clinic option

Our primary laser approach for acne uses 1064 nm long-pulsed Nd:YAG (Fotona SP Dynamis) as an adjunct to a medical plan. Clinical studies support reductions in inflammatory acne lesions and acne-related redness with Nd:YAG protocols. (6,7)

If acne is treatment-resistant and you can tolerate downtime

PDT may be considered. It can be effective for selected patients, but protocols vary and side effects (pain, redness, crusting, pigment change risk) mean it is not a first-line treatment for most people. (9–12)

Multiple options are often used together – for example LED and Nd:YAG – it isn’t necessarily an either, or.

If you’re unsure, a consultation is the fastest way to match the right tool to your acne type and skin sensitivity.

Book an Acne Consultation

LED Therapy for Acne

LED uses specific wavelengths of light, most commonly:

  • Blue light (targets bacterial porphyrins)
  • Red / near-infrared light (anti-inflammatory and healing support)

Mechanism (simplified):
Blue light is thought to activate porphyrins produced by C. acnes, generating reactive oxygen species that damage bacterial cells. Red light penetrates deeper and supports inflammation reduction and repair. (13,14)

Evidence:
Systematic reviews support LED benefit, including for portable/at-home devices, though results are usually more modest than structured in-clinic programs. (5)

Best suited to:

  • mild–moderate inflammatory acne
  • acne in sensitive or reactive skin
  • patients wanting low downtime
  • patients using topical or prescription therapy who want faster inflammation control

Nd:YAG Laser for Acne (Fotona SP Dynamis)

Our core laser approach for active acne uses 1064 nm long-pulsed Nd:YAG (Fotona SP Dynamis).

Why Nd:YAG is used:

  • penetrates deeper than visible light therapies
  • can target inflammatory pathways and vascular components of acne redness
  • may support reduced sebaceous activity in selected patterns (1–3,6)

What the evidence shows:

  • A comparative study found 1064 nm long-pulsed Nd:YAG and 595 nm pulsed dye laser were similarly effective for reducing inflammatory acne lesions and acne erythema in mild to moderate facial acne. (6)
  • Case-based and clinical reports also support Nd:YAG as a useful adjunct when acne is persistent or when inflammation and redness are prominent. (7,8)

Where it fits best:

  • inflammatory acne where topical-only approaches aren’t enough
  • acne with prominent redness
  • patients who want an in-clinic option but wish to avoid prolonged oral antibiotics (where clinically appropriate)

For our service pathway, see: Laser & Light Therapy for Acne

Laser Support for Acne Scarring (Er:YAG Resurfacing)

Once active acne is under control, Er:YAG laser resurfacing can be used to improve acne scar texture and contour in selected patients. Evidence supports Er:YAG resurfacing for atrophic acne scars, including in darker skin types when appropriately selected and performed conservatively. (15–18)

This is not performed as a “first step” for active acne. It is part of a staged plan:

  • control active acne
  • then treat scars and texture

See: Acne Scarring Treatments

Photodynamic Therapy (PDT) for Acne

PDT combines:

1.a topical photosensitiser (most commonly ALA)

2.activation with light (often red LED)

Mechanism (simplified):
ALA is thought to concentrate in pilosebaceous units and enhance the effect of light activation, leading to sebaceous suppression and inflammatory reduction. (9–12)

Evidence:
PDT has many published studies, but there is no universal consensus on the “best” protocol (photosensitiser, incubation, light source, dosing, intervals). Side effects can be significant for some patients (pain, erythema, crusting, post-inflammatory dyspigmentation), which is why it’s selected carefully. (9–12)

PDT plus fractional resurfacing (selected cases)

In some patients, fractional resurfacing (such as fractionated Er:YAG) may be used before ALA application to improve photosensitiser uptake into follicles and sebaceous units. This concept is supported by broader photodynamic therapy literature on methods to enhance drug penetration, and is used selectively when maximising response is prioritised over downtime. (11,19)

For our PDT protocols (including standard and advanced options), see: Photodynamic Acne Therapy 

Other In-Clinic Adjuncts That Can Help

Superficial chemical peels

Most useful for predominantly comedonal acne and congestion. Multiple treatments are required and improvements are often modest. (20,21)

Comedone extraction

Can help resistant blackheads/whiteheads when performed carefully, usually as an adjunct rather than a standalone solution. (20)

Intralesional corticosteroid for a large cyst/nodule

A doctor can inject a small amount of dilute steroid into a very inflamed nodule to flatten it rapidly and reduce discomfort. Evidence quality is limited, but clinical experience supports its use. (22)

What We Recommend in Practice

Because evidence quality varies across technologies, we use a practical hierarchy:

  • start with the least invasive option likely to help
  • combine technology with an evidence-based skincare or prescription plan
  • escalate to Nd:YAG laser or PDT selectively based on acne type and tolerance for downtime
  • reassess at 8–12 weeks before concluding a treatment “failed” (adherence and diagnosis errors are common reasons for non-response)

Book an Acne Consultation

If you’d like a structured plan that matches your acne type, skin sensitivity and downtime tolerance, we’ll guide you to the right pathway — LED, Nd:YAG laser, PDT, prescriptions, or a combination.

Book an Acne Consultation (Main cosmetic Automed booking page)
About Us

Frequently Asked Questions

Is LED a replacement for skincare or prescription treatment?

Usually no. LED works best as an adjunct for inflammation control and recovery support. (5)

Is Nd:YAG laser a stand-alone cure for acne?

No. Nd:YAG is best used as part of a broader plan that addresses follicle plugging, inflammation and maintenance therapy. (1–3,6)

Is PDT the most effective option?

PDT can be powerful for selected patients, but it also has more downtime and variable protocols. It is usually reserved for persistent or resistant acne. (9–12)

Can these treatments prevent scarring?

By reducing inflammation sooner, these approaches may reduce scarring risk, but early control of active acne is the most important factor. (23)

References

1.Barbaric J, Abbott R, Posadzki P, et al. Light therapies for acne. Cochrane Database Syst Rev. 2016;(9):CD007917. https://pubmed.ncbi.nlm.nih.gov/27613035/

2.Hamilton FL, Car J, Lyons C, et al. Laser and other light therapies for the treatment of acne vulgaris: systematic review. Br J Dermatol. 2009;160(6):1273–1285. https://pubmed.ncbi.nlm.nih.gov/19438431/

3.Haedersdal M, Togsverd-Bo K, Wulf HC. Evidence-based review of lasers, light sources and photodynamic therapy in the treatment of acne vulgaris. J Eur Acad Dermatol Venereol. 2008;22(3):267–278. https://pubmed.ncbi.nlm.nih.gov/18081730/

4.Papageorgiou P, Katsambas A, Chu A. Phototherapy with blue (415 nm) and red (660 nm) light in the treatment of acne vulgaris. Br J Dermatol. 2000;142(5):973–978. https://pubmed.ncbi.nlm.nih.gov/10809858/

5.Ershadi S, Barbieri JS. At-home LED devices for the treatment of acne vulgaris: a systematic review and meta-analysis. JAMA Dermatol. 2025;161(6):552–560. https://pubmed.ncbi.nlm.nih.gov/40131744/

6.Chalermsuwiwattanakan N, Rojhirunsakool S, Kamanamool N, Kanokrungsee S, Udompataikul M. Comparative efficacy between 1064-nm long-pulsed Nd:YAG and 595-nm pulsed dye laser for acne vulgaris. J Cosmet Dermatol. 2021;20(7):2108–2115. https://pubmed.ncbi.nlm.nih.gov/33226176/

7.Tlaker V. Successful therapy of excoriated acne with Nd:YAG laser: a case report. Acta Dermatovenerol Alp Pannonica Adriat. 2017;26(3):73–75. https://pubmed.ncbi.nlm.nih.gov/28941267/

8.Gold MH, et al. Current treatments of acne: medications, lights, lasers, and a 1064-nm laser review. J Clin Aesthet Dermatol. 2017. https://pubmed.ncbi.nlm.nih.gov/28703382/

9.Sakamoto FH, Lopes JD, Anderson RR. Photodynamic therapy for acne vulgaris: a critical review (Part I). J Am Acad Dermatol. 2010;63(2):183–193. https://pubmed.ncbi.nlm.nih.gov/20633796/

10.Qureshi S, Rehan Z, Mukovozov I. Photodynamic therapy in acne vulgaris: a systematic review. J Cutan Med Surg. 2024. https://pubmed.ncbi.nlm.nih.gov/39552358/

11.Qiu S, et al. Two-step photodynamic therapy for facial acne reduces pain while maintaining efficacy. Photodiagnosis Photodyn Ther. 2025;46:103351. https://pubmed.ncbi.nlm.nih.gov/40192834/

12.Serra-Guillén C, Llombart B, Sanmartín O. Mild photodynamic therapy with BF-200 ALA for acne vulgaris: clinical efficacy and tolerability. J Clin Med. 2024;13(9):2658. https://pubmed.ncbi.nlm.nih.gov/38731187/

13.Ashkenazi H, Malik Z, Harth Y, Nitzan Y. Eradication of Propionibacterium acnes by its endogenous porphyrins after blue light. FEMS Immunol Med Microbiol. 2003;35(1):17–24. https://pubmed.ncbi.nlm.nih.gov/12628546/

14.Lee WL, Shalita AR, Poh-Fitzpatrick MB. Porphyrin production in P. acnes and P. granulosum. J Bacteriol. 1978;133(2):811–815. https://pubmed.ncbi.nlm.nih.gov/342339/

15.Engin B, et al. Er:YAG laser for atrophic facial acne scars assessed with 22-MHz ultrasonography. J Dermatol. 2012;39(12):982–988. https://pubmed.ncbi.nlm.nih.gov/22973994/

16.Wanitphakdeedecha R, et al. VSP Er:YAG laser resurfacing for acne scars in skin phototypes III–V. Dermatol Surg. 2009;35(9):1376–1383. https://pubmed.ncbi.nlm.nih.gov/19549185/

17.Chathra N, Mysore V. Variable-pulsed Er:YAG resurfacing for acne scars in Fitzpatrick IV–V. J Cutan Aesthet Surg. 2018;11(1):20–25. https://pubmed.ncbi.nlm.nih.gov/29731588/

18.Mani N, Zorman A. High-energy fractional nanosecond Q-switched 1064-nm laser for acne scars. J Cosmet Dermatol. 2021;20(12):3907–3912. https://pubmed.ncbi.nlm.nih.gov/34648683/

19.Champeau M, et al. Photodynamic therapy for skin cancer: techniques to enhance photosensitiser penetration. Photodiagnosis Photodyn Ther. 2019;28:308–322. https://pubmed.ncbi.nlm.nih.gov/31295716/

20.Kempiak SJ, Uebelhoer N. Superficial chemical peels and microdermabrasion for acne vulgaris. Semin Cutan Med Surg. 2008;27(3):212–220. https://pubmed.ncbi.nlm.nih.gov/18702917/

21.Kessler E, Flanagan K, Chia C, et al. Alpha- vs beta-hydroxy acid peels for facial acne. Dermatol Surg. 2008;34(1):45–50. https://pubmed.ncbi.nlm.nih.gov/18093191/

22.Levine RM, Rasmussen JE. Intralesional corticosteroids in nodulocystic acne. Arch Dermatol. 1983;119(6):480–481. https://pubmed.ncbi.nlm.nih.gov/6859682/

23.Zaenglein AL, Pathy AL, Schlosser BJ, et al. Guidelines of care for the management of acne vulgaris. J Am Acad Dermatol. 2016;74(5):945–973.e33. https://pubmed.ncbi.nlm.nih.gov/26897386/