Lipschütz Ulcer, or ulcus vulvae acutum, is a rare and probably underdiagnosed entity that usually presents as an acute painful vulvar ulcer in young women. The etiology is unknown, although recent reports have associated it with the Epstein-Barr virus. The diagnosis is made by exclusion after ruling out sexually transmitted diseases, autoimmune causes, trauma, and other etiologies of genital ulcerations. We report a case of a young woman who developed flu-like symptoms and painful vulvar ulcers. Complementary examinations ruled out sexually transmitted diseases and the other usual causes of genital ulcers; lesions healed with no sequelae or recurrences. This case represents a rare important differential diagnosis of genital ulceration.