When is pelvic ultrasound recommended for imperforate hymen?

An imperforate hymen is a membrane that completely covers the vaginal opening. Menstrual blood can collect behind it, causing increasing lower abdominal pain, pressure, or a bulging membrane after periods begin. Ultrasound can show fluid in the vagina or uterus and help the clinician assess whether the symptoms fit this condition or another cause.

A clinician usually starts with symptoms and a gentle external examination, then chooses the ultrasound approach that is suitable for your age, comfort, and circumstances. Tell the team about pain, difficulty passing urine, and the timing of any bleeding. The scan can support planning for the small procedure that opens the membrane when treatment is needed. See [Pelvic Ultrasound](/treatments/diagnostics-and-imaging/pelvic-ultrasound/) for more about the test.

Seek prompt assessment for cyclical lower abdominal pain without visible menstrual flow, a growing vaginal bulge, difficulty urinating, vomiting, or worsening pressure. Urgent care is needed for severe pain, inability to urinate, fever, fainting, or marked illness.

Ask what the examination suggests, which ultrasound method will be used, whether the scan can identify trapped blood, and what treatment or follow-up will be advised after the result.