Lipschütz ulcer (UL) was described in 1913 by Benjamin Lipschütz. It has unknown etiology. Among the clinical manifestations, pain, edema and local lymphadenopathy, fever, malaise, myalgia and odynophagia are of particular emphasis. Differential diagnoses include infectious diseases, neoplasia, trauma, and sexual abuse. We reported a case of a 14-year-old girl who developed genital ulcer preceded by general nonspecific symptoms. Investigations excluded infectious and inflammatory diseases. Other common causes were also excluded. By eliminating other ethologies and presenting all the diagnostic criteria, the diagnosis of UL was established. The patient presented significant and progressive clinical improvement and was discharged in good general condition, with regression lesion.