TLDR Lasers can trigger skin reactions, especially in darker skin, and more research is needed to improve treatments.
The document reviews laser-induced Koebner-related skin reactions, highlighting that controlled thermal injury from lasers can trigger Koebner phenomenon (KP) in various forms. The review identified 9 true KP cases, 2 possible KP cases, 17 questionable KP cases, and 2 pseudo-Koebner cases. Different lasers are linked to different KPs, with hair removal lasers associated with true and questionable KPs like vasculitis, and resurfacing lasers linked to eruptive squamous atypia. The laser target and number of sessions also influence KP occurrence, with true KPs appearing after 1-2 sessions and eczematous reactions after at least 4. Darker skin phototypes show higher KP frequency due to melanin's role in laser treatment. The study emphasizes the need for further research to improve treatment protocols and minimize adverse effects.
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