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The Food and Drug Administration (FDA) has defined permanent hair reduction as " I a significant reduction in the number of terminal hairs after a given treatment, which is stable for a period of time longer than the complete growth cycle of hair follicles at the given body site i ,"4 and this statement must be discussed at the patient's first visit, before the beginning of the procedure. Therefore, the FDA amended the permanent hair reduction definition, stating that " I the number of hairs regrowing must be stable over a time greater than the duration of the complete growth cycle of hair follicles, which varies from 4 to 12 months according to body location i ." LHR is generally a safe and effective method for long time reduction of unwanted hair, with minor and temporary side effects, but serious complications may rarely arise, especially when laser devices are used unproperly by untrained personnel.6 " I Primum non nocere i " meaning "First, do no harm" must be applied in every aspect of our practice, including in LHR, and the most practical way is to prevent complications. [Extracted from the article]