Why Are My Teen’s Periods So Heavy? Should I Be Concerned?

Look for signs of an underlying bleeding disorder

Mom and daughter have a seriuous discussion

As if the raging adolescent hormones aren’t enough, now your daughter has her period. And the bleeding is sort of … heavy. Is this something to worry about? 

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A heavy period may be just that, or it may be the sign of an undiagnosed bleeding disorder.

In people with bleeding disorders, the blood doesn’t clot as it should. But the signs aren’t always obvious.

“Some girls (and their parents) don’t realize there’s an issue until they start menstruating,” says pediatric hematologist Ravi Talati, DO.

First periods: What’s typical?

When a young woman starts her period, her hormone systems are still maturing. That means her cycle might be irregular for a couple of years. But even after she matures, what counts as “regular” varies from person to person.

Typically, though, you can expect one period every 28 days or so. It usually lasts about a week. And heavy bleeding generally only occurs in the first few days – not for the entire period.

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Period bleeding that’s cause for concern

Your daughter probably doesn’t want to discuss her period with you. (Can you blame her?) But talk to her if you notice that she:

  • Is going through a huge stack of pads each month
  • Has periods that last longer than 10 days
  • Has heavy bleeding throughout her entire period

If she does have a bleeding disorder, you might notice these other signs as well:

  • Easy bruising
  • Frequent nosebleeds
  • Blood loss when a baby tooth fell out or while brushing teeth
  • History of significant bleeding during minor surgery
  • Family history of bleeding disorders or heavy periods

Some unlucky women just have heavier periods than others. But if you have any concerns, it’s worth taking your teen to see a doctor – even if it means risking some heavy-duty eye rolling.

Von Willebrand disease

Von Willebrand disease is the most common bleeding disorder in the U.S. Other, less common bleeding disorders also affect clotting or the function of platelets.

These diseases sound scary — especially when you’re thinking about your own child. In many people, though, symptoms are mild and can be managed effectively, often with medications.

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Doctors may prescribe medications such as hormones that can help with symptoms. Talking to a doctor can help get to the bottom of the bleeding so your daughter can get the help she needs.

Treatment for heavy menstrual bleeding

Heavy periods are definitely not fun. Teens who experience them might avoid activities like swimming or biking with friends. They might feel extra self-conscious about their clothes or embarrassed to carry a purse full of pads everywhere they go.

“The biggest issues for these young women are often quality-of-life challenges,” Dr. Talati says. Luckily, hormonal treatment (like birth control pills) can make periods more manageable — both for young women with bleeding disorders, and those who “just” have heavy periods.

If your adolescent daughter has heavy periods, schedule an appointment with her pediatrician or family physician. If she does have signs of a bleeding disorder, expect a referral to a hematologist. Those specialists can diagnose and manage bleeding disorders — and help your daughter start feeling like herself again.

She might even be glad you started that awkward conversation.

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