The Vital Sign Nobody Checks

How to Actually Read Your Period Your monthly health report — and what it's been trying to tell you

Every month, your body produces one of the most information-rich health reports available to any practitioner. It arrives reliably, it requires no appointment, no needle, no lab requisition. It is detailed, consistent, and entirely specific to you.

Most women have been taught to ignore it.

Your period — the color, the flow, the timing, the texture, the presence or absence of pain — is not incidental. It is not just the byproduct of a cycle that didn't result in pregnancy. It is a readout. A monthly summary of your hormonal health, your nutritional status, your inflammatory load, and the overall state of your reproductive health. When something is off, it shows up here first, often months or years before it shows up anywhere else.

Learning to read it is one of the most practical things you can do for your long-term health.

So let's do that.

What a healthy period actually looks like

This is something I wish every girl was told before her first bleed — a simple, clear description of what healthy actually means, so she has something to measure against.

A healthy period arrives predictably, somewhere in a cycle that runs between 21 and 45 days during your early cycles as a teen, and between 24 and 35 days once they're established — with your own personal normal being far more meaningful than any population average. It lasts between three and seven days. The flow is moderate — not flooding, not barely there. The color is a warm, medium red for most of the bleed (like you'd see from a fresh wound), transitioning to a lighter flow at the end. There may be minor discomfort, particularly on the first day or two, but it should not disrupt your life. You should not need to plan your week around it. You should not need more than standard pain relief, if any at all.

That is the baseline. And I want you to notice something about that description: it is not particularly demanding. A healthy period is simply one that arrives, does what it came to do, and leaves — without drama, without crisis, and without requiring you to cancel plans, call in sick, or manage your pain from the moment you wake up.

If yours doesn't match that description, your body is not failing. It is communicating. And it has probably been communicating this for a long time, to anyone who was willing to listen.

WHAT YOUR PERIOD IS TELLING YOU — AND WHAT YOU'VE LIKELY BEEN TOLD INSTEAD

If your periods are painful:

Mild cramping on day one or two falls within a normal range — the uterus is a muscle, and muscular effort produces sensation. But pain that sends you to bed, that requires prescription medication, that radiates into your back and thighs, that makes you vomit — that is not normal. That is not "just how periods are." That is your body signalling something that deserves investigation.

The most common roots of significant menstrual pain are prostaglandin imbalance — often downstream of chronic inflammation, poor omega-3 status, or a diet high in inflammatory foods — and conditions like endometriosis or adenomyosis, both of which are profoundly undertreated and underdiagnosed. Endometriosis alone affects roughly one in ten women, and the average time from first symptom to diagnosis in Canada is still somewhere between seven and ten years.

Seven to ten years of being told it's normal. Seven to ten years of managing rather than understanding.

If your periods have always been painful, or if they've become more painful over time, please bring that to a practitioner who takes it seriously. It is information. It deserves a real response.

If your flow is very heavy:

Heavy periods — flooding, soaking through protection faster than expected, passing clots larger than a quarter — are almost always a signal of relative estrogen dominance. This doesn't necessarily mean your estrogen is high in absolute terms; it means there is more estrogen than progesterone can effectively balance. The uterine lining builds thicker than it should, and when it releases, it releases heavily.

The roots vary — it might be insufficient progesterone production, sluggish estrogen clearance through the liver, thyroid disruption, fibroids, or the hormonal shifts of perimenopause, which often brings heavier periods before they taper. What matters is that heavy periods are not just an inconvenience to manage with a more absorbent product. They are your body's way of asking for attention to something specific.

If your periods are very light or infrequent:

A very light flow or cycles that arrive irregularly or infrequently can signal that ovulation isn't happening consistently — and since ovulation is what generates progesterone, its absence has effects that ripple across the whole cycle and beyond. Undereating, overexercising, significant stress, thyroid dysfunction, and PMOS/PCOS are all common contributors. This pattern is particularly worth paying attention to if you are in your reproductive years and thinking about fertility, but it matters regardless — ovulation is your body's monthly proof of hormonal health, and its absence is worth understanding rather than simply accepting.

If your period has changed:

This is perhaps the most important signal of all. A cycle that has always been regular and then becomes irregular. Periods that were manageable and then become painful. A flow that was moderate and suddenly becomes flooding, or nearly absent. Change is your body marking a transition — and transitions have causes. They are worth following.

The two most common transitional triggers I see in practice are coming off hormonal birth control — where the body is recalibrating to its own hormonal pattern for the first time in years — and the early stages of perimenopause, which can begin quietly in the mid-to-late thirties with cycle changes that don't yet look like anything a woman has been told to associate with menopause. Both are worth understanding.

Neither should be met with a shrug.

The practice of reading your period

You don't need an app for this. You don't need a chart, a wearable, or a subscription service. You need five minutes at the end of each period to notice a few things and write them down somewhere. Cycle length. Duration of bleeding. Colour at its heaviest. Flow at its heaviest. Pain level on a simple scale. Any clots. Any spotting before or after. Number of days between the first day of your last period and the first day of this next one.

That's it. Over three to four cycles, patterns emerge that are genuinely useful — to you, and to any practitioner you work with. It is the difference between arriving at an appointment and saying "my periods have been off" and being able to say "for the last four months my cycle has shortened from 29 days to 24, my flow has increased significantly on days two and three, and I'm passing small clots I didn't used to pass."

That second version gets you somewhere. It's the difference between a vague concern and a clinical picture. Your period has been keeping records this whole time. It's worth learning to read them.

If painful periods have been part of your story, I want you to know that this is one of the areas where herbal medicine genuinely shines. I say this from experience, because I found herbal medicine at age 17 when I had painful period cramping, and it changed my life. It doesn't work by masking the pain — but by addressing the physiology behind it, with plants that the body receives as support rather than override. That distinction matters more than I can say in a few paragraphs.

FROM THE DISPENSARY - CRAMP BARK (Viburnum opulus)

If raspberry leaf is the quiet nourisher I reach for first, cramp bark is the one I reach for when a woman describes the kind of period pain that stops her in her tracks.

Viburnum opulus — Cramp Bark — is the inner bark of the Guelder Rose, a shrub that grows across temperate woodlands and hedgerows, and whose antispasmodic properties have been well-documented in herbal practice for well over a century. Its action is specific and relatively swift: it relaxes smooth muscle. The uterus is smooth muscle. When menstrual cramping is the kind that comes in waves, that grips and releases, that feels like a tightening you can't breathe through — cramp bark is what I think of first.

It works best as a tincture, taken at the first sign of cramping rather than after pain has fully established — think of it the way you'd think of any muscle-relaxing intervention: more effective before the spasm locks in than after. I typically combine it with other herbs depending on the picture — with Black Haw (Viburnum prunifolium, its close botanical relative and equally valuable companion) for more persistent cramping, with Ginger when there's a cold, constricted quality to the pain, with nervines when the pain is riding alongside significant anxiety or tension.

As with all things in herbal medicine, Cramp Bark is most effective as part of a conversation rather than a standalone fix. Addressing the prostaglandin imbalance upstream — through omega-3 support, anti-inflammatory nutrition, and deeper hormonal work — is what changes the pattern over time. Cramp Bark meets you in the acute moment. The rest of the work changes what that moment looks like month after month.