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	Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

Q-switched lasers have effectively treated tattoos with a low risk of scarring.^1-4 We describe 2 patients with "double tattoos" who developed hypertrophic scarring following a single Q-switched laser treatment.

Case 1

An 18-year-old man, skin type II, presented with a professional tattoo on his right upper arm. It was initially a black tattoo of a tribal figure that was later covered by a black tattoo of a panther. The patient had no history of keloids or hypertrophic scarring.

The upper two thirds of the tattoo was treated with a 755-nm Q-switched alexandrite laser (3-mm spot, 6.0 J/cm², 100 nanoseconds) while the lower third was treated with a 694-nm Q-switched ruby laser (QSRL) (6.5-mm spot, 6 J/cm², 25 nanoseconds). Whitening appeared immediately, then faded within 30 minutes. Within 24 hours, hemorrhagic blisters developed, which later became crusted and healed after 3 weeks. Although a substantial reduction in tattoo ink occurred by . . . [Full Text of this Article]

Case 2

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