A vaginal obstruction often occurs as a result of complication in women who had previously undergone an excision of a transverse vaginal septum. Her we are reporting a case of 12 years old unmarried girl presented with complaint of secondary amenorrhea and cyclic pain lower abdomen since two months. She was operated for cryptomenorrhea four months back. On examination under anaesthesia Thick scarred septum was present in vaginal canal about 6-7 cm from vaginal introitus .After sharp dissection hematocopos bulge seen and drained, residual scar tissue excised , posterior and anterior vaginal wall reconstructed. Vaginal mould inserted to maintain patency.