on February 25, 2026
Your period, also known as menstruation, is one of the most informative things your body does each month. Often called the fifth vital sign, it offers a window into your overall hormonal health and wellbeing. And yet, for something so central to female health, it's rarely talked about with the depth and openness it deserves.
Many women experience a range of physical and emotional symptoms around their period: cramps, mood shifts, fatigue, headaches. These are real, and they matter. But understanding why they happen, and what your cycle is actually telling you, can make a significant difference to how you experience them.
This guide covers the essentials: why menstruation happens, what's normal, what isn't, and how to support your body through it.
Why do you get your period?
Your period is the result of a carefully orchestrated hormonal process. Each month, eggs mature in your ovaries in preparation for potential fertilisation. Before ovulation, oestrogen builds up the lining of the uterus. Ovulation typically occurs around 14 days before your next period, when a mature egg travels down the fallopian tube toward the uterus.
If the egg is not fertilised, oestrogen and progesterone levels fall. This hormonal drop signals the body to begin menstruation. The uterine muscles contract, shedding the uterine lining along with a small amount of blood through the vagina.
This process repeats every cycle, and it is entirely normal and healthy. Products such as menstrual cups, tampons, and pads are available to suit different preferences and needs throughout your bleed.
When does your period arrive?
Cycle length is individual and can vary from cycle to cycle. The average cycle is around 29 days, while the period itself typically lasts between 2 and 7 days. To calculate your cycle length, count from the first day of one period to the day before the next begins.
Tracking your period over several months helps you recognise your personal patterns and anticipate when your next period is likely to arrive. Cycle tracking with a device like Daysy takes this further: by measuring your basal body temperature each morning, Daysy identifies the different phases of your cycle and alerts you 3 days before your next period is due with a purple flashing light. The DaysyDay app provides the same information automatically on your phone.
How much blood do you actually lose?
Less than most people assume. The average blood loss per cycle is around 30 to 70 millilitres, roughly 5 to 14 teaspoons. Over a lifetime of approximately 500 menstrual cycles across a 38-year fertility window, that adds up to around 30 litres in total. A remarkable reminder of what our bodies quietly manage while we go about daily life.
What symptoms are common during your period?
Period symptoms vary significantly between women and from cycle to cycle. The most commonly reported include:
- Cramps and lower abdominal pain
- Mood changes
- Bloating
- Headaches
- Breast tenderness
- Acne
This list is not exhaustive. Symptoms are as individual as cycles themselves.
What is PMS and how do you recognise it?
Premenstrual syndrome (PMS) refers to a cluster of physical and emotional symptoms that appear in the days before menstruation, typically 4 to 14 days before your period starts. For some women, symptoms are mild. For others, particularly those with premenstrual dysphoric disorder (PMDD), they can be significantly disruptive.
It's worth saying clearly: debilitating PMS is not something you simply have to accept. Severe pain or pronounced depressive symptoms that interfere with daily life are a signal that something needs attention, and it's worth speaking with a healthcare provider.
Tracking your basal body temperature can help you connect symptoms to specific phases of your cycle, making it easier to anticipate and prepare for them rather than being caught off guard.
What causes PMS?
The exact cause of PMS is not fully understood, and it is likely that multiple factors are involved. PMS symptoms occur in the second half of the cycle, after ovulation, when progesterone rises and oestrogen declines. With the arrival of menstruation and the start of a new cycle, symptoms typically subside.
Research points to fluctuating oestrogen and progesterone levels as a key driver, partly because these hormones influence serotonin production. Serotonin levels decline steadily after ovulation and drop sharply just before menstruation begins, which may explain mood-related symptoms.
Other contributing factors may include changes in electrolyte and fluid balance, low melatonin levels, thyroid function, diet, and exercise habits. Much remains to be understood, and research in this area is ongoing.
How can you ease period discomfort?
There is no universal solution, but these approaches help many women:
Apply heat: A warm bath or hot water bottle can relax the uterine muscles and ease cramping. Taking a heat pack to work or school on difficult days can make a real difference.
Rest more: Your body uses more energy during menstruation. Extra sleep, breathing exercises, or gentle yoga can all support recovery during this phase.
Move gently: Light exercise such as walking, cycling, or stretching can loosen muscles and reduce cramping. Listen to your body and adjust intensity accordingly.
First periods, irregular cycles, and when to seek help
When does the first period arrive?
The first period, known as menarche, typically begins between the ages of 11 and 12, though every body develops at its own pace and earlier or later is also normal. Early signs can include whitish or yellowish discharge appearing around 12 months before the first bleed, as well as physical changes such as a growth spurt, wider hips, or breast development.
A first period is a natural and healthy milestone. If questions arise, speaking with a parent, trusted friend, or gynaecologist is always a good option.
What causes cycle irregularities?
Occasional fluctuations in cycle length are common and usually not a cause for concern. Stress, travel, changes in diet, intense exercise, hormonal imbalances, or taking the morning-after pill can all affect the timing of your period. If irregularities persist over several months, it's worth discussing them with a doctor.
When should you seek medical advice?
Period pain should never be normalised as something you simply have to endure. Speak with a gynaecologist if you experience:
- Severe pain each month that limits your daily activities
- Bleeding heavy enough to require changing a pad or tampon every 1 to 2 hours
- Periods lasting longer than 7 days
- Significant mood disturbances in the second half of your cycle
Conditions such as endometriosis, PCOS, uterine fibroids, or thyroid dysfunction can all affect menstruation and are treatable when identified early.
A note from Period Wisdom Boutique
Period Wisdom Boutique exists because we believe women deserve to understand their bodies. Not in a clinical, overwhelming way, but in a way that feels personal, empowering, and genuinely useful in everyday life.
Your period is not a burden to manage. It is information. When you understand what your cycle is telling you, you can respond to your body with care rather than confusion. That shift from uncertainty to self-knowledge is exactly what we are here to support.
