Paradoxical Effect After IPL Photoepilation

    November 2002 in “ Dermatologic Surgery
    Gerardo A. Moreno‐Arias, Camil Castelo‐Branco, Juan Ferrando
    TLDR IPL can cause unexpected hair growth in nearby untreated areas.
    The study investigated the paradoxical effect of intense pulsed light (IPL) photoepilation in 49 females with facial hirsutism, specifically focusing on unexpected hair growth in untreated areas near the treated zones. Five patients, aged 13 to 44, all with skin phototype III and diagnosed with polycystic ovarian syndrome, exhibited this effect. These patients underwent six to nine IPL sessions, and the paradoxical hair growth appeared between the third treatment session and up to six months post-treatment. The study concluded that IPL could activate dormant hair follicles in areas adjacent to those treated for hirsutism.
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