Heavy periods are more common than many women realise, affecting about 1 in 4. Because everyone's "normal" is different, it can be hard to know whether your bleeding is heavy. This page explains how to tell, what causes heavy periods, and the treatments available in Australia.

Emergency

Call triple zero (000) or go to your nearest emergency department if you have heavy vaginal bleeding and:

• you are soaking through a pad or tampon every hour for 2 hours or more
• you feel faint, dizzy, short of breath, or have chest pain
• you are or could be pregnant
• you have severe pain in your lower abdomen

Key points

• About 1 in 4 women have heavy periods at some stage.
• A period is "heavy" if it affects your life, not because of a set number of pads or tampons.
• Common causes include non-cancerous growths (fibroids or polyps) in or on the womb (uterus), hormonal changes, the uterus lining growing into its muscle wall (adenomyosis) and blood clotting problems (bleeding disorders).
• Heavy periods often cause low iron, which can make you tired and affect your concentration.
• Effective treatments include the hormonal intrauterine device (IUD), tranexamic acid, hormonal contraception and, sometimes, surgery.
• A Doccy consultation can help with medical certificates, special consideration letters, contraception, and gynaecology referral if you already have ultrasound and blood test results.

What counts as a heavy period?

Doctors used to define heavy menstrual bleeding (menorrhagia) as losing more than 80 ml of blood per cycle, but no one measures this at home. Australian guidelines now define it as bleeding that affects your physical, emotional, social or practical quality of life. If your periods are affecting how you live, they are too heavy.

Signs your bleeding may be heavier than normal:

• changing a pad or tampon every 1 to 2 hours on your heaviest days
• passing clots larger than a 50-cent coin
• using a pad and tampon together, or overnight pads during the day
• bleeding through your clothes or bedsheets
• periods that last more than 7 days
• avoiding activities, cancelling plans or missing work because of your period
• feeling exhausted, lightheaded or short of breath during or after your period

Symptoms of heavy periods

Heavy bleeding often comes with:

• painful cramps (dysmenorrhoea)
• tiredness that does not improve with rest
• feeling breathless or dizzy, especially with activity
• difficulty concentrating or "brain fog"
• anxiety or low mood around your period

Tiredness, breathlessness and poor concentration are often caused by iron deficiency anaemia. Iron stores can drop slowly over months or years of heavy bleeding, and many women do not realise until they have a blood test. Period pain is covered in more detail in our period pain article.

When to see a doctor

If you have any of the signs in the emergency box at the top of this page, call triple zero (000) or go to your nearest emergency department.
Get an urgent GP appointment, or call healthdirect on 1800 022 222 for advice, if:

• you are passing large clots and feel very tired or unwell
• you have bleeding between periods, after sex or after menopause
• your periods have suddenly become much heavier

See a GP if:

• your periods are affecting your daily life, work or activities
• you change a pad or tampon every 1 to 2 hours, pass clots larger than a 50-cent coin, or bleed for more than 7 days
• you feel tired, breathless or run down, which can be a sign of low iron
• you want to talk about treatment options

Your GP can arrange blood tests (a full blood count and iron studies) to check for anaemia, and a pelvic ultrasound to look for causes such as fibroids or polyps.

You do not need to put up with heavy periods. Many women live with heavy bleeding for years because they think it is normal. Effective treatments exist.

Causes of heavy periods

Fibroids are non-cancerous growths in the wall of the uterus. They are very common, especially over the age of 30, and are one of the main causes of heavy periods.
Adenomyosis is when tissue like the lining of the uterus grows into its muscular wall. It causes heavy, painful periods and is most common in women in their 30s and 40s.
Hormonal changes, especially cycles where you do not release an egg (ovulate), can make the lining of the uterus build up and shed heavily. This is more common in teenagers and in women approaching menopause.
Polyps are small, usually non-cancerous growths on the lining of the uterus that can cause heavy or long periods.
Bleeding disorders, such as von Willebrand disease, affect how well your blood clots. They are more likely if your periods have been heavy since your very first period, or if family members bleed easily.

Changes to the lining of the uterus. Rarely, heavy bleeding is a sign that the lining of the uterus has become too thick (endometrial hyperplasia). Over time, this can sometimes lead to cancer of the uterus lining (endometrial cancer). Your doctor will want to check for this sooner if you:

• are over 45
• are overweight
• have diabetes
• have had cancer of the uterus or bowel, or a close family member has
• take tamoxifen (a breast cancer medicine), or take oestrogen without a progestogen
• got your first period at a young age, or reached menopause later than usual
• have never given birth
• have been told before that the lining of your uterus is too thick

Finding these changes early means they can be treated. Your doctor may arrange an ultrasound and, sometimes, a small sample of the uterus lining (uterine biopsy).

Other causes include a copper IUD (especially in the first few months), blood-thinning medicines, thyroid problems and polycystic ovary syndrome (PCOS). These are more important to check if your pattern has changed.

How heavy periods are diagnosed

Your doctor will ask about your periods (how heavy, how long, any changes and how they affect your life), other symptoms, medicines, family history of bleeding problems and whether you could be pregnant.

• Blood tests: a full blood count checks for anaemia and iron studies check your iron stores. Your doctor may also check your thyroid and blood clotting.
• Pelvic ultrasound: the most common scan, which can show fibroids, polyps and adenomyosis. An internal (transvaginal) ultrasound gives the clearest picture.
• Hysteroscopy: if needed, a thin camera is passed through the cervix to look inside the uterus. Polyps can be removed and tissue samples taken at the same time.

Treatment for heavy periods

Treatment depends on the cause, your age, whether you want children in the future and your preferences. Your doctor can help you weigh up the options.

• Hormonal IUD: a small device placed in the uterus that releases a progestogen hormone. It is one of the most effective treatments, reducing blood loss by up to 90% after a few months, and many women have very light periods or none at all. It also provides contraception. It is recommended as a first-line treatment in Australian and international guidelines. When placed for heavy periods it can remain in place for up to 5 years.
• Tranexamic acid: a prescription-only, non-hormonal medicine that helps blood clot. Taken only on your heavy days, it can reduce blood loss by 25 to 50%. It does not provide contraception.
• Hormonal contraceptives: the combined contraceptive pill can lighten and regulate periods, especially when taken continuously without the sugar-pill break. Progestogen pills are another option.
• Anti-inflammatory medicines: taken during your period, they can reduce bleeding and help with period pain.
• Iron: if your iron is low, your doctor will recommend iron supplements. Rebuilding iron stores usually takes a few months.
• Surgery: if medicines are not enough, options include, but are not limited to, removing polyps or fibroids and endometrial ablation (removing the lining of the uterus). These are managed by a gynaecologist (a surgeon who specialises in problems with the female reproductive system).

Self-care and living with heavy periods

• Eat iron-rich foods, such as red meat, chicken, fish, legumes, leafy greens and iron-fortified cereals. Vitamin C (citrus, capsicum, tomato) helps you absorb iron, while tea and coffee with meals reduce absorption.
• Plan for heavy days. Keep spare underwear and clothes handy. Period underwear, menstrual cups or discs can help with heavy flow.
• Track your periods in an app or diary, including how many products you use and whether you pass clots. This is useful for your doctor.
• Rest when you need to. Heavy periods are draining, especially if your iron is low.

Some women also notice headaches around their period; see our menstrual migraine article.

Outlook

The main complication of heavy periods is iron deficiency anaemia, which can cause tiredness, poor concentration and sometimes hair loss. Heavy periods can also affect your mental health, work and social life. The outlook is good: most women find a treatment that greatly reduces their bleeding, and if one does not work, there are others to try.

How Doccy doctors can help

A Doccy consultation can help if you have heavy periods and none of the warning signs on this page. A Doccy consultation can:

• provide a medical certificate if heavy periods mean you need time off work or study, or a carer's certificate
• provide a special consideration letter if heavy periods have affected a university assessment or deadline
• prescribe contraception, including options that can make periods lighter, if it is appropriate
• continue a prescription for medicine you already take for heavy periods, if it is appropriate
• arrange a referral to a gynaecologist if you already have pelvic ultrasound results and recent blood tests

Doccy will be offering blood tests for iron levels in the near future.

A Doccy consultation is not suitable if you have any of the signs in the emergency box. A doctor cannot examine you remotely, so a first assessment of heavy bleeding usually needs your GP, who can also arrange blood tests and an ultrasound.

Resources and support

healthdirect: information on heavy periods and a 24-hour nurse advice line on 1800 022 222.
Jean Hailes for Women's Health: information on heavy periods, iron deficiency and treatment options.
The Royal Women's Hospital (Melbourne): patient information on heavy bleeding and its treatment.
RANZCOG: consumer information on heavy menstrual bleeding.
These services and websites can provide extra information, but they do not replace advice from your own doctor.

1. healthdirect. Heavy periods (menorrhagia). 2024. https://www.healthdirect.gov.au/heavy-periods
2. Jean Hailes for Women's Health. Heavy periods. 2024. https://www.jeanhailes.org.au/health-a-z/periods/heavy-periods
3. The Royal Women's Hospital (Melbourne). Treating heavy bleeding with medication. 2024. https://www.thewomens.org.au/health-information/periods/heavy-periods/treating-heavy-bleeding-with-medication
4. RANZCOG. Heavy menstrual bleeding. 2018. https://ranzcog.edu.au/wp-content/uploads/Heavy-Menstrual-Bleeding.pdf
5. Lethaby A, Hussain M, Rishworth JR, Rees MC. Progesterone or progestogen-releasing intrauterine systems for heavy menstrual bleeding. Cochrane Database Syst Rev. 2015;(4):CD002126. https://pubmed.ncbi.nlm.nih.gov/25924648/
6. NICE. Heavy menstrual bleeding: assessment and management (NG88). 2018. https://www.nice.org.uk/guidance/ng88
7. The Royal Children's Hospital Melbourne. Clinical Practice Guidelines: Adolescent gynaecology - heavy menstrual bleeding. 2025. https://www.rch.org.au/clinicalguide/guideline_index/adolescent_gynaecology_menorrhagia/
8. Australian Commission on Safety and Quality in Health Care. Heavy Menstrual Bleeding Clinical Care Standard. 2024. https://www.safetyandquality.gov.au/standards/clinical-care-standards/heavy-menstrual-bleeding-clinical-care-standard