maybe. if she is well into puberty (breast development pubic hair etc. ) but certainly there are other causes. accidental straddle-type injuries can cause vaginal or hymen tears. some virginal hymens are nearly imperforate (little or no opening) and an injury could have caused a rupture. this sensitive area is rich in blood supply so bleeding can be concerning. it may be wise to have her examined by her medical provider (hopefully someone who is sensitive and caring and will not cause her undue embarrassment). ask her about possible injuries and sadly ask if anyone has touched her inappropriately. most of the time however these sudden bleeding episodes are trauma but if they occur again in a cycle. this could have been her first period.
my 12 yr old daughter had a lot of blood gush out yesterday but nothing since then could this be her period starting? . she has never had any discharge or bleeding before and out of nowhere this gush of bright red blood came out everywhere. she has not had anything since then could she be starting menstruation? i thought that it would last a few days if it was?