A period arrives a week early, then not for two months. Sleep stops working somewhere around three in the morning. A word you have used your whole life will not come. Each of those has an innocent explanation available, and most women take it, one at a time, for months or years.
Set them side by side and they stop being thirty mysteries and become one pattern. That is the entire purpose of this list.
First, what it is
Perimenopause is the transition into menopause. Hormones swing rather than decline steadily, which is why the experience is erratic and why a hormone panel drawn on a single morning can read completely normal.
It commonly begins in the early-to-mid forties, sometimes in the late thirties, and commonly runs four to eight years. You are still cycling and still potentially fertile throughout. The symptoms are often loudest years before your periods visibly change.
Cycle changes — the anchor signals
- Irregular length — cycles varying by a week or more from what was normal for you. This is the signal clinicians anchor on.
- Skipped periods — gaps of sixty days or longer, which mark the later stage of the transition.
- Changed flow — markedly heavier or lighter than your own baseline.
Heat and sweats — the famous ones
Hot flashes through the face and chest, lasting minutes, arriving anywhere from several times a day to a few times a month. Night sweats, which are the same event happening while you are asleep and are frequently the reason the sleep problem started.
These are the symptoms the whole category is named after, and a great many women never get them. Their absence rules nothing out and never has.
Sleep and mood — the quality-of-life ones
Broken sleep, classically the three-a.m. wake with no obvious cause. Mood swings, irritability, and anxiety that feels disproportionate to whatever set it off. Brain fog — losing words, losing threads, rereading the same paragraph.
The cognitive part frightens people more than anything else on this page, so it is worth saying plainly: it is common, it is real, it is not early dementia, and for most women it eases after the transition. It is also the symptom most heavily targeted by supplements. Be sceptical of anyone selling you a cure for it in a bottle.
The body list — the ones nobody warns you about
Chest pain, breathlessness, or fainting is an emergency. That is not a symptom to log; it is a reason to call for help now.
- Joint aches and morning stiffness, often mistaken for a training injury or for age arriving early.
- Drier skin and thinning hair.
- Changes in sex drive, and vaginal dryness — treatable, and frequently never raised because nobody opens the subject.
- Weight settling around the middle, on an unchanged diet.
- Headaches or migraines changing their pattern, sometimes appearing for the first time.
- Breast tenderness, in a different rhythm than before.
- Heart palpitations — usually benign in this context, and still worth mentioning to a clinician.
The red flags — see a clinician promptly
These are not on the watch-and-wait list. They are reasons to book the appointment regardless of what any tracker, score, or article — including this one — says.
- Any bleeding after twelve consecutive months without a period.
- Soaking through a pad or tampon every hour.
- Bleeding after sex.
- A period running longer than ten days.
Why the pattern matters more than any single symptom
Presented one at a time, each item above has a competing explanation, and "I feel off" is a hard sentence for a clinician to act on inside a short appointment. Presented as three months of dated entries, the same information is specific, sequenced, and yours — and the conversation can start at what to do about it, including whether hormone therapy is worth discussing.
That is the whole argument for keeping a record: not that writing things down treats anything, but that it converts a year of being told this is probably nothing into eleven minutes of talking about something.
The honest caveat
This is educational and it is not medical advice, a diagnosis, or a substitute for a clinician. No list, and no app, can tell you that you are in perimenopause. Second Spring keeps the record — symptoms, sleep, temperature and cycle gaps in about ten seconds a day, on your device rather than our servers, exportable as a clean CSV whenever you want it, and it hands you one page to take to the appointment. It records; the clinician decides.