Mechanical obstruction by hematocolpos can result in acute urinary retention. This is an adolescent girl 15 year old who presented amenorrhea, cyclic abdominal pain and acute retention of urine. On examination patient was found to have imperforate hymen. She underwent hymenectomy. Postoperative period was uneventful. We conclude that in peripubertal female with acute urinary retention, hematocolpos should be considered.
