Background: Imperforate hymen is an uncommon obstructive anomaly of the female reproductive tract, which occurs due to incomplete degeneration of the central portion of the hymen. The diagnosis of the condition may be ignored until adolescence. After puberty, accumulation of menstrual blood in the vagina (hematocolpos) can manifest clinical symptoms. This report aims to present a rare congenital anomaly.

Case report: A 14-year-old girl was admitted to Imam-Ali hospital (Zahedan) with complaints of acute urinary retention, lower abdominal and supra pubic pain. The diagnosis of imperforate hymen was confirmed using gynecological examination and abdominal ultrasonography.

Conclusion: The imperforate hymen can usually be diagnosed by taking a careful history of the patient along with gynecological examination. Moreover, pelvic-abdominal ultrasonography can be used for the detection of hematocolpos due to imperforate hymen.