Comprehensive Guide to Acne Treatments

23 Feb Comprehensive Guide to Acne Treatments

By Dr Rachel Ho | Aesthetic Doctor, Founder, The Skin Longevity Clinic, Singapore

Acne is one of the most common yet psychologically stressful conditions I treat in Singapore. Acne affects nearly 85% of individuals between ages 12 and 24, with many experiencing persistent breakouts well into adulthood. At The Skin Longevity Clinic, the complex and multi-factorial nature of acne is addressed with evidence-based treatment options and precise, scientifically-validated approaches that also respect the skin barrier and the biology of Asian skin. Here’s a doctor’s guide to understanding the cornerstone treatments for acne. 

Acne is more than a cosmetic concern—it’s a complex dermatological condition that affects As both a dermatologist and someone who has witnessed the profound impact clear skin can have on confidence and quality of life, I believe in empowering patients with comprehensive understanding of evidence-based treatment options that extend far beyond traditional topical therapies.

The Science Behind Acne Formation

Before exploring treatments, it’s essential to understand acne’s underlying mechanisms. Acne vulgaris develops through four primary pathways:

1. Abnormal keratinization leading to follicular plugging
2. Sebaceous gland hyperactivity increasing oil production
3. Bacterial colonization by Cutibacterium acnes
4. Inflammatory cascade activation causing the characteristic redness and swelling

Modern guidelines emphasise combining therapies to target more than one pathway at once for better results and to reduce antibiotic resistance.

Overview of acne treatments in Singapore

Medical treatment of acne consists of a combination of topical and oral medications. Examples of these medications include: 

• Benzoyl peroxide
• Topical retinoids
• Topical/oral antibiotics (when needed, usually short-term and paired with benzoyl peroxide)
• Hormonal options (particularly helpful for hormonally driven acne patterns)
• Oral isotretinoin (for severe acne, scarring risk, or acne that doesn’t respond well to standard therapy)

These treatments are strongly supported by clinical guidelines and remain the backbone of effective acne care.

So where do chemical peels, lasers, LED light, andradiofrequency fit in? Think of them as precision tools for the right indications, especially when we’re treating persistent acne, oiliness, inflammation, post-acne marks, or scarring.

Chemical peels: calming congestion, refining pores, and helping acne marks

Best for:

• Comedonal acne (blackheads/whiteheads)
• Mild–moderate inflammatory acne (in carefully selected patients)
• Post-acne pigmentation and texture roughness
• Patients who want a “reset” to congestion while continuing medical therapy

How chemical peels improve acne?

Chemical peels represent one of dermatology’s most time-tested approaches to acne management, offering controlled exfoliation that addresses multiple acne pathways simultaneously.

Mechanism of Action for chemical peels

Chemical peels work by inducing controlled epidermal injury, promoting accelerated cell turnover and preventing comedone formation. The most effective agents for acne include:

Salicylic Acid (Beta-hydroxy acid)

• Penetrates sebaceous follicles due to lipophilic properties
• Provides anti-inflammatory and mild antibacterial effects
• Concentrations of 20-30% show optimal efficacy

Glycolic Acid (Alpha-hydroxy acid)

• Smallest molecular size enables deep penetration
• Stimulates collagen synthesis while reducing post-inflammatory hyperpigmentation
• Concentrations of 35-70% used in clinical settings

Lasers and light-based devices: targeting inflammation, redness, oil glands, and sometimes bacteria

Best for:

• Persistent inflammatory acne
• Acne-associated redness
• Oily skin patterns where sebaceous activity is a major driver
• Some patients who cannot tolerate certain medications
• Often also used in acne scar management (different category of lasers)

How lasers can help acne

Different devices act on different targets — this is where device-based dermatology Modern laser therapy has revolutionized how we manage inflammatory acne, particularly for patients who wish to avoid long-term antibiotics.

Mechanism of action for lasers

Q-switched 1064nm Nd:YAG lasers  work via selective photothermolysis. By targeting the micro-vasculature around inflamed sebaceous glands, these lasers reduce redness and decrease the blood supply to the overactive gland, effectively reducing the activity of the sebaceous gland. Studies have shown that laser therapy also induces a sub-lethal thermal effect on Cutibacterium acnes bacteria, reducing the microbial population without promoting antibiotic resistance.

Lasers are dual-action; they treat active inflammation while simultaneously stimulating early collagen remodeling to prevent deep scarring.

LED light therapy: gentle, supportive, and best as an adjunct

Best for:

• Mild–moderate acne (especially inflammatory lesions)
• Patients who want a low-downtime, low-irritation add-on
• Maintenance once acne is controlled
• Some patients who cannot tolerate stronger topicals during flares

Mechanism of action for LED light therapy

Blue Light (415 nm)

• Activates endogenous porphyrins in C. acnes
• Creates reactive oxygen species leading to bacterial destruction
• Provides anti-inflammatory effects through cytokine modulation

Red Light (660 nm)

• Penetrates deeper into dermal tissue
• Stimulates cellular metabolism and wound healing
• Reduces inflammatory mediators

Radiofrequency: more established for acne scarring, emerging for acne control in selected cases

Radiofrequency (RF) deserves a clear distinction:

1) RF for acne scars 

Best for: atrophic acne scars (rolling, boxcar, some mixed scars), texture irregularities, enlarged pores

Fractional RF microneedling delivers energy through micro-needles creating controlled thermal zones with depth-controlled heating (0.5-3.5 mm) to target sebaceous glands and stimulate neocollagenesis for improved skin texture

2) RF for active acne 

Radiofrequency introduces surface heating resulting in sebaceous gland modification, reducing their size and sebum output. Evidence published in Dermatologic Surgery indicates that RF energy can lead to long-term remission of acne by physically altering the overactive oil glands that drive the disease..

Combining Modalities: The Synergistic Approach

Modern acne treatment frequently benefits from combining multiple modalities to address the condition’s multifactorial nature. At The Skin Longevity Clinic, I often design personalized treatment protocols that may include medications, chemoexfoliation and energy based therapies guided by up to date evidence and best practice guidelines. This individualised approach maximises therapeutic outcomes while minimizing individual treatment intensity and potential side effects.

Each treatment modality requires careful patient assessment and individualised planning:

Pre-treatment Evaluation:

• Comprehensive acne assessment (lesion types, severity, distribution)
• Medical history including photosensitivity and autoimmune conditions
• Current medications and skincare regimen review
• Realistic expectation setting and treatment timeline discussion

Contraindications to Consider:

• Active skin infections or inflammatory conditions
• Pregnancy and breastfeeding (for certain modalities)

Doctor’s takeaway on acne treatments in Singapore

The landscape of acne treatment continues to evolve, with emerging technologies and refined protocols offering hope to even the most challenging cases. What remains constant is the importance of individualised care, evidence-based treatment selection, and the patient-doctor partnership that forms the foundation of successful outcomes.

Remember that acne treatment is rarely a linear journey. Consistency with skincare and treatments are essential in the recovery process. At The Skin Longevity Clinic with Dr Rachel Ho, you’re not just receiving treatment; you’re joining a community committed to treating your acne and protecting your skin health. I’m here to guide you through every step of this journey, celebrating each improvement and adjusting our approach as your skin responds and evolves.