Back Blackheads (Truncal Acne): Treatment Ladder and Prevention

Stepwise Management

1. Cleansing: Daily benzoyl peroxide 2.5–5% or salicylic acid 2% wash; leave on 1–2 min. Avoid harsh scrubs.
2. Topical retinoid: Adapalene 0.1% gel (OTC) or tretinoin 0.025–0.05% (Rx) nightly – normalizes follicular keratinization.
3. Leave-on BPO: 2.5% cream/gel on affected areas – bactericidal, anti-inflammatory.
4. Chemical exfoliation: Glycolic/lactic acid 10% pads 2–3×/week.
5. Clay/charcoal masks: 1–2×/week for sebaceous areas.

Lifestyle Modifiers

• Shower immediately post-exercise; change sweaty clothes.
• Loose, breathable fabrics (cotton, moisture-wicking synthetics).
• Non-comedogenic sunscreen/lotions.
• Adequate hydration, lower glycemic load diet (evidence emerging).

When to Escalate

• No improvement after 8–12 weeks consistent OTC regimen.
• Nodulocystic lesions, scarring, hyperpigmentation.
• Psychological distress.

Dermatologist may add: oral antibiotics (doxycycline/sarecycline), hormonal therapy (females), isotretinoin (severe), professional extractions, chemical peels, laser.