Labial adhesions occur most often in infants and young girls and are associated with low oestrogen levels. Herein, we report a case of labial adhesion in a 24-year-old young girl, who presented with acute retention of urine. Clinical examination revealed normally developed external genitalia and a thin membrane occluding the introital opening. Her secondary sexual characters were normal; the most probable cause being acute vaginitis, her hormonal profile was not done. Patient was managed with sharp excision of membrane followed by local application of antibiotics. Patient was asymptomatic at three months follow-up with completely healed labia. Hence, all women including unmarried ones who present with urinary complaint need to have a complete gynaecological examination as the two can be related.