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Figure 4. Phototherapy-induced inflammatory hyperpigmentation (PIH). 46-year-old Fitzpatrick II Female pre-treated with our skincare
regimen (Tretinoin, Vitamin C, and Hydroquinone 4%) 1 month prior to intense pulsed light (IPL) phototherapy (left) with a normal
physiological hyperpigmentation response to phototherapy (right). PIH normally occurs within 6 h of IPL treatment and typically
resolves at 5-7 days
Figure 5. Pulsed-laser phototherapy [intense pulsed light (IPL)] complication. Patient presented for IPL therapy without compliance to
preoperative skincare regimen and with extended sunlight exposure over a period of 72 h prior to IPL therapy. Prior sunlight exposure
resulted in a cumulative excess of UV light which resulted in a superficial burn. The burn fully resolved with a short course of topical
hydrocortisone cream
