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Making Sense of Heavy or Irregular Periods

A practical guide to understanding when period changes are worth discussing with a gynaecologist.

Published 28 September 2026

Periods vary widely from person to person, which can make it confusing to know what counts as "normal" and what might be worth getting checked. This guide walks through common reasons periods change and when it makes sense to seek advice.

What counts as a heavy or irregular period?

A period is generally considered heavy if you need to change your pad or tampon very frequently, pass large clots, or find that bleeding interferes with daily activities. Irregular periods refer to cycles that vary a lot in length, or bleeding that happens outside the usual monthly pattern.

  • Needing to change protection every hour or two
  • Periods lasting noticeably longer than usual for you
  • Cycles that are consistently shorter or longer than the typical range
  • Spotting or bleeding between periods

Common reasons behind these changes

There are several possible reasons for heavy or irregular bleeding, and many of them are manageable once identified. Hormonal imbalances, growths such as fibroids or polyps, and conditions like PCOS are among the more common causes seen in gynaecology practice.

Why tracking your cycle helps

Keeping a simple record of when your periods start and end, how heavy the flow feels, and any other symptoms can be genuinely useful information for a doctor. Patterns over several months often reveal more than a single cycle in isolation.

  • Note the start and end date of each period
  • Record how many pads or tampons you use on heavy days
  • Mention any pain, mood changes or other symptoms alongside your cycle
  • Bring this record with you to your appointment

What a consultation usually involves

During a consultation, the gynaecologist will ask detailed questions about your cycle history, general health and any family history of reproductive conditions. Depending on your symptoms, they may suggest a physical examination or an ultrasound scan to look more closely at the womb and ovaries.

When to seek help sooner rather than later

While many period changes are not serious, some patterns are worth discussing promptly rather than waiting it out. These include periods that suddenly become much heavier than usual, bleeding after menopause, or pain that is severe enough to disrupt your daily routine.

Taking the first step

If your periods have changed noticeably or are affecting your quality of life, it is reasonable to seek a professional opinion rather than assuming it will resolve on its own. An early conversation often makes it easier to identify the cause and find a way to manage it comfortably.

Sources

This article is general health information and is not a diagnosis or a substitute for advice from your own doctor. In an emergency, go to the nearest emergency department.

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