Heavy periods: why standard period products aren't designed for you

A "super" tampon absorbs 9 to 12 ml of blood, a standard pad barely more. Yet some women lose 80 ml or more per cycle, the medical threshold for menorrhagia (abnormally heavy periods) ^[2]. When your flow exceeds the product's capacity, leaks aren't an accident: they're the logical result of protection that wasn't designed for you.

Manufacturers calibrate their products for an average flow, estimated at 30 to 40 ml per cycle. It's a bit like shoes only coming in one size. And when protection can't keep up, you carry the mental load: anticipating, checking, changing, cleaning.

This burden is not trivial. One in two women with very heavy periods reports a negative impact on her work life ^[5]. Over time, the risk of iron-deficiency anemia is high ^[4]. Common does not mean normal: women have too often been taught to stay quiet.

Good news: products suited to heavy flows exist, even if they're rarely front-of-shelf. The large menstrual cup (25 to 42 ml depending on the model) holds far more than a tampon. Worn internally and graduated, it also lets you measure your flow. A Lancet Public Health meta-analysis (43 studies, over 3,300 participants) found a leakage rate similar to or lower than tampons and pads ^[6]. The menstrual disc goes further, up to 50 to 70 ml.

High-capacity period underwear absorbs the equivalent of 3 to 5 tampons. Alone on moderate days, it becomes backup on heavy days alongside a cup or disc. Many women adopt this double protection on their own, and it makes sense ^[6]. Wearing a nighttime pad during the day stays simple and accessible: it's not a failure, it's an adaptation.

Capacity at a glance:

• Super tampon: 9 to 12 ml, change every 4 to 6 hours.
• Large cup: 25 to 42 ml, up to 8 to 12 hours.
• Menstrual disc: 50 to 70 ml, up to 12 hours.
• High-capacity underwear: equivalent of 3 to 5 tampons, washable and reusable.
• Double protection (cup or disc + underwear): the most reassuring on heavy days.

Flow naturally varies from one woman to the next, that's true. But there is a threshold: above 80 ml per cycle, it's called menorrhagia ^[2]. The problem is that nobody measures their loss with a graduated beaker.

That's why a simple tool exists: the Higham score, or PBAC (a visual chart for rating blood loss). Over one cycle, you record how many products you use, how saturated they are, and any clots ^[7]. A score above 100 signals menorrhagia, with reliability above 80% ^[7][8]. You can walk into your appointment with that number, and it changes the conversation.

Very heavy periods aren't always "just the way it is." In about half of cases, a treatable cause is found ^[1]. A diagnosis can then change everything.

Uterine fibroids (benign tumors of the uterine muscle) are the leading cause: they affect 40 to 80% of women before age 50, with 25 to 30% having symptoms ^[9]. Adenomyosis, where endometrial tissue (the lining that bleeds each month) grows into the uterine muscle, affects about 20% of women and often takes years to be recognized ^[10]. Polyps, some bleeding disorders, and endometriosis are other leads.

On treatment, the range goes well beyond the pill, and step by step:

• Tranexamic acid: non-hormonal, taken 2 to 4 days a month, cuts blood loss by 40 to 58% ^[1][11].
• Anti-inflammatories (ibuprofen, mefenamic acid): reduce flow by 20 to 40% and ease pain ^[1].
• Levonorgestrel IUD (Mirena), recommended first-line: reduces flow by 71 to 96% at one year ^[1][11].
• Endometrial ablation (a minimally invasive surgery that removes the lining, once pregnancy plans are complete): flow cut by more than 80% ^[11][12].

The choice is made with your doctor, based on your preferences, your pregnancy plans, and the identified cause. Hysterectomy (removal of the uterus) stays reserved for when other treatments fail. You have the right to know all your options.