Experts call for prompt evaluation of heavy menstrual bleeding in adolescents, highlighting risks of silent bleeding disorders and the need for better diagnosis and management.
Heavy periods in teenage girls should not be dismissed as a routine part of adolescence, experts say, because they can be an early warning sign of an inherited bleeding disorder such as haemophilia or von Willebrand disease. The call for quicker evaluation comes as clinicians and patient groups continue to warn that heavy menstrual bleeding is often normalised, even though it can affect daily life and point to more serious health problems. The CDC says heavy menstrual bleeding can mean periods lasting more than seven days, frequent pad or tampon changes, or large blood clots, while the American College of Obstetricians and Gynaecologists says it is not normal and can be disruptive.
The argument is set out in a study published in Research and Practice in Thrombosis and Haemostasis, where an international group of researchers said teenagers are often not assessed thoroughly enough when they report heavy bleeding. They noted that many adolescents may not describe their periods as “heavy”, either because they are uncomfortable talking about menstruation or because they assume their experience is typical if relatives also bleed heavily. The researchers said clinicians should ask more specific questions about how long bleeding lasts, how often products must be changed, and whether periods interfere with school, sport or other activities.
The study also points to a simple “7-2-1” guide that can help identify possible heavy menstrual bleeding: periods lasting more than seven days, needing to change menstrual products more often than every two hours, or passing clots larger than 1 inch. The CDC’s definition aligns closely with those warning signs, and the researchers said the issue matters because heavy bleeding may be the first or only sign of a bleeding disorder. They added that repeated blood loss can drain iron stores, leading to iron deficiency and, in severe cases, iron deficiency anaemia.
According to the researchers, evaluation should not stop at assuming irregular ovulation is to blame, even though immature hormone patterns are a common cause of heavy periods in early adolescence. Bleeding disorders can occur on their own or alongside those hormonal cycles, and certain features should raise concern: heavy bleeding from the first period, symptoms that continue beyond the first two years after menstruation begins, poor response to hormonal treatment, hospital admission, transfusion, iron deficiency anaemia, or a personal or family history of unusual bleeding. Initial testing can include a blood count, iron studies and clotting tests, including checks for von Willebrand disease, but more specialised work-up should be led by a haematologist, ideally at a haemophilia treatment centre.
The study highlighted major gaps in care. In the data cited by the authors, only 10.6% of adolescents with heavy menstrual bleeding were screened for von Willebrand disease, while 41.2% had a blood count, 14.2% had iron studies and just 3.3% were referred to a haematologist. The authors said better coordination between primary care, gynaecology and haematology is needed, along with more training for clinicians and broader awareness among families, teachers, coaches and school nurses. They also noted that desmopressin, or DDAVP, may help control bleeding in some patients but remains underused, even as newer intranasal formulations could improve access.
Disclaimer: This content is for informational purposes only and is not intended to be a substitute for professional medical judgment, advice, diagnosis, or treatment.
