The 2026 pilot found PDL (pulsed dye laser), IPL (intense pulsed light), and Nd:YAG laser all reduced inflammatory acne, with no winner. Inflammatory acne means red bumps, pus spots, and tender nodules, and for adults with lasting breakouts researchers need larger, longer trials to guide choice. The trial assigned 36 patients with moderate-to-severe inflammatory acne to the three devices.
Each person received three sessions two weeks apart. The U.S. National Library of Medicine abstract describes this three-arm design in its pilot abstract.
Medical information disclaimer: This article is for general educational purposes only and does not provide medical advice, diagnosis, or treatment. Always consult a physician or other qualified health professional about symptoms, medications, tests, or treatment decisions.
Table of Contents
- What did the three sessions test?
- Did one device work better?
- How did pain and redness compare?
- What should adults ask before booking?
What did the three sessions test?
In the pilot described by the U.S. National Library of Medicine, clinicians counted inflamed spots and scored severity at each visit. Treatment meant three sessions, spaced two weeks apart.
Follow-up ended two weeks after the third session. They also used the Cardiff Acne Disability Index, a short survey on embarrassment, social limits, and daily bother. That focus matters for adults who face work photos, events, and persistent flare-ups.
Did one device work better?
The U.S. National Library of Medicine abstract reports lesion counts and severity scores fell clearly inside each arm. Yet scores did not differ between PDL, IPL, and Nd:YAG at any visit (P 0.06-0.92). Disability scores also improved in all three arms, without a between-group gap (P=0.45).
An earlier 34-patient split-face trial reached a similar tie between 1064-nm Nd:YAG and 595-nm PDL for lesions and redness. The U.S. National Library of Medicine abstract notes fewer side effects and stronger patient preference for Nd:YAG in its split-face trial summary. For adults weighing repeat visits, comfort can matter as much as clearance.
How did pain and redness compare?
The pilot described by the U.S. National Library of Medicine found harms minimal across arms. Only one mild redness case occurred, in the PDL group.
Patients in the Nd:YAG group reported less procedural pain than the other groups. Short redness fades quickly for many people, but pain shapes whether someone finishes a course. Adults with low pain tolerance or tight schedules may want to discuss numbing, cooling, and session length.
What should adults ask before booking?
American Academy of Dermatology guidance finds evidence insufficient for routine laser and light use, as reported by Newswise in its updated acne guidance summary. That stance makes a personal consult important for persistent adult acne. A dermatologist can weigh standard care, skin tone, scarring risk, and cost.
Use the visit to compare practical trade-offs, not brand names. Ask for a clear count of sessions, checks, and follow-up. Request costs in writing, including touch-ups. Leave with a review date and clear steps if irritation lasts.
- Ask how many sessions your clinic plans and how progress will be measured.
- Ask about expected pain, redness, downtime, and aftercare for your skin.
- Bring past prescriptions and ask how light options fit current care.
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