Heavy Periods: What's Normal, What's Not, and When To See Your GP

At Shire Family Medical, the GP medical centre in Sutherland, women’s health consultations include assessment and management of heavy periods across all life stages — from teenagers and women in their 30s and 40s, to those approaching and going through menopause.

Heavy menstrual bleeding is common, affecting approximately one in four women. But “common” does not mean normal for you, and it does not mean you have to manage around it indefinitely. When bleeding disrupts sleep, work, exercise, or everyday confidence — or when you are going through more period products than feels right — it is worth speaking with a GP.

This article explains what heavy periods are, what period blood clots can indicate, the most common causes, when to book a GP review, and how heavy periods can be managed.

What Is Considered a Heavy Period?

A period is considered heavy if you lose more than 80 mL of blood per cycle, or if bleeding lasts more than eight days — but in practice, what matters most is whether the bleeding is affecting your quality of life.

You may be experiencing heavy periods if you:

• Need to change pads, tampons or menstrual products every one to two hours.
• Need to change protection overnight.
• Bleed for longer than eight days.
• Pass blood clots larger than a 50-cent coin.
• Bleed through clothing or bedding.
• Need to use multiple products at once to feel protected.
• Avoid work, school, exercise or social plans because of bleeding.
• Feel exhausted, dizzy or short of breath around your period.

Many people adapt to heavy bleeding over time and do not realise how much has changed until they start tracking it. If your period is organising your schedule or limiting your confidence, it is reasonable to seek a GP assessment.

What Do Period Blood Clots Mean?

Passing blood clots during a period is common and often happens on the heaviest days of the cycle. Small clots — smaller than a 50-cent coin (approximately 3 cm) — are generally within the range of normal for many people.

Larger clots, or clots that occur frequently throughout your period, can be a sign of heavier-than-typical bleeding that warrants assessment. They tend to occur when blood loss is faster than the body’s natural anticoagulants can process it.

If you are regularly passing clots larger than a 50-cent coin — particularly if this is new or has been getting worse — it is worth raising with a GP. Blood clots in a period can sometimes be associated with conditions such as fibroids, adenomyosis, or hormonal changes, though in many cases no specific cause is found.

Why Heavy Periods Happen

Heavy menstrual bleeding can have several causes, and sometimes no single underlying reason is identified. That does not make the symptoms less real or less worth managing.

Possible contributors may include:

• Hormonal changes — fluctuations in oestrogen and progesterone can cause the uterine lining to thicken and shed more heavily.
• Perimenopause — the years leading up to menopause, when cycles can become irregular, longer, or heavier.
• Fibroids — non-cancerous growths in or on the wall of the uterus.
• Polyps — small growths on the uterine lining that can increase bleeding.
• Adenomyosis — when the tissue that normally lines the uterus grows into the muscular wall.
• Endometriosis — when tissue similar to the uterine lining grows elsewhere in the body.
• Thyroid conditions — an underactive thyroid can affect menstrual bleeding.
• Bleeding disorders — such as von Willebrand disease, where blood does not clot as effectively.
• Certain medications — including blood thinners.
• Changes after starting or stopping contraception — hormonal shifts can alter bleeding patterns during transition.

Heavy bleeding after menopause is not considered normal and should be assessed by a GP promptly. If you are pregnant, could be pregnant, or are experiencing severe pelvic pain or feel acutely unwell alongside heavy bleeding, seek urgent medical attention.

How Heavy Periods Affect Iron Levels

Heavy menstrual bleeding is one of the most common causes of iron deficiency in women. When the body loses more blood than it can comfortably replace cycle after cycle, iron stores fall over time. This can lead to iron deficiency and, where the deficiency is significant, iron deficiency anaemia.

Symptoms that may suggest low iron include:

• Persistent tiredness or fatigue that rest does not fully resolve.
• Dizziness, particularly when standing up.
• Shortness of breath with everyday activity.
• Headaches.
• Poor concentration or difficulty focusing.
• Restless legs, particularly at night.
• Feeling unusually cold.
• Pale skin or pale inner eyelids.

These symptoms can have many causes, and low iron should be confirmed with blood tests rather than assumed from symptoms alone. Our related article on how GP blood test results are reviewed explains what happens after pathology is ordered and why follow-up matters.

If iron deficiency is confirmed and oral supplementation has not been sufficient or is not suitable, your GP may discuss whether an iron infusion is appropriate. Our article on what to expect before and after an iron infusion explains how this treatment fits into a broader care plan.

When To See a GP About Heavy Periods

You do not need to wait until symptoms are severe before booking a GP appointment. A review is appropriate whenever heavy periods are affecting your daily life, have changed unexpectedly, or are causing concern.

Consider booking an appointment if:

• Your periods are heavier than they used to be.
• You are bleeding for longer than usual.
• You are regularly passing large clots.
• You feel tired, dizzy, weak or short of breath around your period.
• You have pelvic pain or worsening period pain.
• You are bleeding between periods or after sex.
• Your bleeding is limiting work, school, exercise or social activities.
• You are nearing menopause and your bleeding pattern has changed significantly.
• You are worried about how your contraception may be affecting your cycle.

If you experience any bleeding after menopause, see a GP promptly — this is not considered normal and requires assessment without delay.

What Happens at a GP Appointment for Heavy Periods

A GP appointment for heavy periods is usually a conversation first. Your GP will ask questions about your bleeding pattern, symptoms and medical history before discussing any tests or treatment options.

It helps to arrive prepared. Useful information to bring includes:

• How long your periods typically last.
• How often you are changing pads, tampons or menstrual products on your heaviest days.
• Whether you are passing clots, and roughly how large.
• Whether you have any bleeding between periods or after sex.
• Whether you have pelvic pain or pain during sex.
• Which contraception you use, if any.
• Any symptoms of low iron, such as fatigue or dizziness.
• Medications or supplements you currently take.
• Any family history of bleeding conditions.

Tracking your period for two or three cycles before your appointment can be very helpful. Note the start and end date, your heaviest days, whether you are passing clots, any activities you missed, and any symptoms such as fatigue or dizziness.

Depending on your symptoms, history and clinical assessment, your GP may discuss:

• Pregnancy testing, where relevant.
• Blood tests to check iron levels, thyroid function, or other markers.
• Cervical screening status.
• A pelvic ultrasound, where clinically indicated.
• Referral to a gynaecologist if further assessment is needed.

How Heavy Periods Can Be Managed

Management depends on the underlying cause of bleeding, your symptoms, health history and pregnancy plans. There is no single right approach for everyone — your GP will discuss what is suitable for your individual circumstances.

Options a GP may discuss include:

• Monitoring and tracking symptoms over a number of cycles.
• Iron replacement if iron deficiency is identified — through diet, oral supplementation, or in some cases, an iron infusion.
• Non-hormonal medicines to help reduce blood loss, where appropriate.
• Hormonal options that may help regulate or reduce bleeding.
• Long-acting reversible contraception, including IUD options.
• Further investigation or specialist referral, depending on what is found.

Where Contraception Fits Into the Conversation

For some patients, contraception is part of managing heavy periods. For others, the priority may be pregnancy prevention, cycle control, or pain management — and the choice needs to account for personal medical history and preferences.

Shire Family Medical, an AGPAL-accredited GP medical centre in Sutherland, NSW, provides IUD insertion, removal and replacement consultations with Dr Katrina Mikhail, where clinically appropriate. A consultation covers contraception goals, menstrual symptoms, hormonal and non-hormonal options, risks, side effects, procedure planning and follow-up care.

If you are not sure where to start, our article on how to choose a contraception option explains how preferences, lifestyle, symptoms and medical history shape the discussion.

Heavy Periods Deserve Proper Care

Heavy periods are common — but that does not mean they are something to endure without support. If your bleeding is limiting your life, affecting your energy, or causing anxiety about leaving home, those are reasonable grounds to speak with a GP.

At Shire Family Medical in Sutherland, a GP can help you understand whether your bleeding pattern warrants further investigation, whether your iron levels need attention, and which management options are most likely to work for your circumstances.

Speak with a GP about heavy periods and women’s health →

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