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Paradoxical effect after IPL photoepilation
Gerardo Moreno-Arias1, Camil Castelo-Branco, Juan Ferrando
1Department of Dermatology, Hospital Clínic-University of Barcelona, Barcelona, Spain.
Summary
Intense pulsed light (IPL) hair removal can paradoxically stimulate hair growth in adjacent untreated areas. This study identified this "paradoxical effect" in five patients with facial hirsutism and polycystic ovarian syndrome.
Area of Science:
- Dermatology
- Endocrinology
- Medical Aesthetics
Background:
- Intense pulsed light (IPL) is a common hair removal technique.
- While generally safe, IPL can cause side effects, including unexpected hair growth.
Purpose of the Study:
- To investigate the clinical and hormonal profiles of females experiencing unintended hair growth near IPL-treated facial areas.
- To understand the "paradoxical effect" of IPL photoepilation.
Main Methods:
- Studied 49 females with facial hirsutism undergoing IPL treatment.
- Excluded tumoral hyperandrogenism and measured various hormone levels.
- Monitored patients for the "paradoxical effect" during and after IPL sessions.
Main Results:
- Identified five patients (ages 13-44, skin phototype III) with the "paradoxical effect."
- All diagnosed with polycystic ovarian syndrome and ovarian hyperandrogenism.
- The effect emerged between the 3rd IPL session and 6 months post-treatment.
Conclusions:
- IPL treatment may inadvertently activate dormant hair follicles in untreated zones adjacent to treated hirsute areas.
- This phenomenon warrants further investigation in the context of hair removal treatments.