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Mechanical obstruction by hematocolpos can result in acute urinary retention.1 Imperforate hymen is a rare condition that presents mainly with primary amenorrhea, cyclic abdominal pain and rarely, urine retention in pubertal girls.2 This is a 23-year old female who presented with acute urine retention. She had history of previous vaginal repair of imperforate hymen. On examination patient was found to have imperforate hymen. After fixing a catheter, an US scan showed hematocolpos that was confirmed CT. She was eventually underwent hymenectomy. We conclude that in peripubertal female with acute urinary retention, hematocolpos should be considered.