In general, the shape of the hymen may vary from person to person and may be umbrella, semicircular, round, crescent, ring, and other shapes. The shape of the hymen will generally be different for each person. The vaginal opening is usually covered with a dense, fibrous membrane called the hymen, which can take the shape of an umbrella, circle, semicircle, and crescent. In young children, the hymen may be ring-shaped, and the size of the hole in the hymen generally varies from person to person. Some people may experience atresia during development and may experience abdominal pain during puberty due to poor drainage of menstrual blood. In addition, some people’s hymens are looser and may rupture after strenuous exercise. If any of the above symptoms occur, it is recommended that you seek medical attention in a timely manner and under the guidance of your doctor to avoid delays in your condition.