Hello and welcome to HCM,
is a thin membrane present at the opening of the vaginal opening.
Any trauma can cause the hymen to rupture.
This trauma can be form of any foriegn body insertion or some jolt.
However, you have rule out the menstrual blood flow.
If the bleeding continues for long, is associated with symptoms of menstruation
like dysmenorrhea; the bleeding is due to menstruation.
The bleeding due to hymen rupture is self limited.
It will stop after some time.
Thanks and take care.
Dr Shailja P Wahal