Mojito-Induced Phytophotodermatitis: A Case of Lime-Triggered Skin Reaction.

Introduction: Phytophotodermatitis is a cutaneous reaction resulting from skin contact with certain plant-derived phototoxic compounds, followed by ultraviolet exposure. Lime-induced phytophotodermatitis, sometimes called "lime disease" or "margarita photodermatitis," is one of the most common forms, caused by furocoumarins in lime juice or peel. Despite being well described, the condition remains underdiagnosed and is frequently mistaken for allergic dermatitis, burns, cellulitis, or even abuse, particularly when occurring in atypical linear or patterned distributions. Case Presentation: We report a case of lime-induced phytophotodermatitis in a 25-year-old woman who developed a striking, linear, hyperpigmented lesion on her forearm after spilling a mojito cocktail on her skin during prolonged sun exposure. Conclusion: This case underscores the importance of recognizing the condition in the context of leisure and vacation settings, where patients may overlook or fail to report relevant exposures, and highlights the role of patient education to prevent recurrence.