Period symptoms have a time they arrive and a time they leave. Most begin in the five days before bleeding starts, and are gone within four days of it. Once you know where you are in your cycle, you know why today feels the way it does.
That is the practical difference between a period symptom and something else: timing. What returns in the same week of every cycle and then leaves with the bleeding belongs to your period. What stays all month has another cause, and is worth asking about.
Is this my period coming?
This is the question asked a week before, and again the day before. The signs differ depending on how close it is.
A week to two weeks before: bloating, breast tenderness, shifting mood, cravings, and tiredness with no obvious cause. This stretch is broader and quieter, and the symptoms come and go.
A day or two before: the range narrows and the signs sharpen. Cramping begins or intensifies, the lower back feels heavy, and you may notice light brown discharge — which is a prelude to bleeding rather than bleeding itself.
The most reliable thing you have is not this list, it is your own record. A symptom that turned up three days before bleeding in each of your last two cycles will most likely turn up again.
Where each symptom falls in your cycle
Period days
- Cramping low in the abdomenUsual — starts with bleeding or just before
- Heaviness in the lower backUsual
- Tiredness and low energyUsual
- Bleeding beyond eight daysWorth raising with a doctor
After your period
- Energy returning graduallyUsual — the quietest days of the cycle
- Clearer mood and focusUsual
Around ovulation
- Clear discharge like egg whiteUsual — a sign ovulation is near
- A light twinge on one sideUsual for some women
Before your period
- Breast tendernessUsual — begins after ovulation
- Bloating and appetite changesUsual
- Mood swings and tensionUsual — worth raising if it derails your day
What is usual, and where it becomes worth asking
| Symptom | Usual | Worth raising with a doctor |
|---|---|---|
| Cramping | Starts with bleeding or just before, lasts up to three days | Does not ease with painkillers, or stops your day |
| Days of bleeding | Three to seven days | More than eight days |
| How heavy | Varies day to day, heaviest in the first two | Changing every hour or two, or large clots |
| Mood | Shifts before bleeding and leaves with it | Persists after bleeding ends, or disrupts work and relationships |
| Between periods | No bleeding | Bleeding between periods, or after sex |
Period pain: how much is usual
Usual pain starts with bleeding or shortly before, and lasts up to three days. It happens because the womb tightens to shed its lining — a muscle contracting, not an injury. It normally eases with heat, gentle movement such as walking, and a simple painkiller.
Anything beyond that is not something to put up with. Pain that worsens month after month, or does not respond to painkillers, or arrives outside your bleeding days, has causes medicine knows — endometriosis and fibroids among them — and all of them can be diagnosed and treated.
When is it premenstrual syndrome?
Over 90% of women get some symptoms before their period. Premenstrual syndrome names something narrower: symptoms that appear in the five days before bleeding, across at least three cycles in a row, end within four days of it starting, and keep you from your ordinary day.
If it does not derail your day, these are period symptoms rather than a syndrome. The distinction is not a matter of wording: it is what decides whether the situation needs following up.
There is a more severe form called premenstrual dysphoric disorder (PMDD). The symptoms look similar but the effect on daily life is far greater, and it deserves a doctor who knows it by name — because it is treated differently.
You do not need to log everything. Log what bothers you, on the day it bothers you. The rest becomes clear on its own after two or three cycles.