J Cosmet Dermatol. 2025 Jun;24(6):e70231. doi: 10.1111/jocd.70231.
ABSTRACT
BACKGROUND: Single-wavelength lasers (755 or 810 nm) are widely used to remove unwanted hair. Recently, combined-wavelength diode lasers have been introduced to improve the safety of darker skin types, owing to their varying absorption spectra and penetration depths. However, their application beyond hair removal remains unclear.
AIMS: This study aimed to evaluate the efficacy of a high-power triple-wavelength diode laser (810, 940, and 1060 nm) in treating hirsutism, inflammatory follicular disorders, and aesthetic concerns such as hairline enhancement in darker skin types.
PATIENTS/METHODS: This retrospective study was conducted at the Escallent Institute of Lasers & Aesthetic Medicine (EILAM), Gurugam, India, using a Primelase device with a triple-wavelength diode laser. The study involved adults with skin type IV who presented with facial hirsutism and follicular disorders, including trichostasis spinulosa, pilonidal sinus disease, and hidradenitis suppurativa. Efficacy was assessed using hair counting and the Global Aesthetic Improvement Scale (GAIS), whereas safety was evaluated based on reported adverse effects, such as pain, erythema, and edema.
RESULTS: The GAIS scores indicated a mean improvement of 3.4 ± 0.4 out of 4, representing a 50%-75% improvement. Hair counting revealed a statistically significant hair reduction of 82.9% ± 15.4%, with reductions ranging from 56% to 100%. No adverse events were observed.
CONCLUSION: The high-power triple-wavelength diode laser demonstrated both efficacy and safety in treating facial hirsutism and other follicular disorders as well as aesthetic concerns such as hairline enhancement, particularly in darker skin tones.
PMID:40464115 | DOI:10.1111/jocd.70231
