Short answer: Track first bleeding days, total bleeding days, product-change frequency, leaks or clots, pain timing and location, related symptoms, what helped, and what the pattern interrupted. Bring several cycles when possible.

Start with the timeline

The NHS defines Day 1 as the first day of a period. Record that date consistently, then note the final bleeding day. This separates cycle length from period length and helps reveal whether the gap between starts is changing.

An app or paper diary can help. The NHS specifically says a symptom diary across the cycle can give a doctor a detailed idea of what happens and when.

  • First day of each period.
  • Last bleeding day.
  • Unexpected bleeding between periods or after sex.
  • Missed dates and any corrections made later.

Add observable flow and pain details

Write what happened rather than estimating a diagnosis. For flow, product-change frequency, combined protection, leaks, bleeding beyond seven days and clot size are easier to communicate than labels such as bad or extreme.

For pain, record location, timing, duration, whether it spreads, what you tried and whether it stops usual activities.

Include context without blaming yourself

List contraception, medicines or recent changes that might affect the pattern. Note associated symptoms such as tiredness, shortness of breath, pelvic pressure, pain during sex, or pain when peeing or pooing if they are present.

Do not assume stress, weight, exercise or a named condition is the cause. Those possibilities require context and sometimes examination or testing. A log supports the conversation; it does not replace it.

A useful summary can fit on one screen: what changed, when it changed, how often it happens, what other symptoms occur and what help you need. Keep the underlying daily entries available, but lead with that summary so the appointment is not spent reconstructing dates from memory.

  1. Choose a simple format you can maintain.
  2. Record concrete events for two or three cycles when time allows.
  3. Highlight the change from your usual pattern.
  4. Bring questions and the outcome you want help with.
Important: Tracking cannot diagnose a condition or determine that a concerning change is safe. Seek timely care rather than waiting months to complete a diary when symptoms are severe or worsening.

Sources