Medically reviewed by Dr Matt Cullen MBBS, FRANZCP
If you've been period-free for 12 months or more and you've noticed bleeding, spotting or unusual discharge, the most important thing to know is this: it needs to be checked. Not next week, not when it's convenient, but with an appointment booked now. Most causes of postmenopausal bleeding are benign. A small but real proportion are not. The reason for prompt assessment is that early diagnosis genuinely matters for outcomes.
Key facts at a glance
- Any vaginal bleeding more than 12 months after your last period is considered postmenopausal bleeding (PMB).
- Around 9 in 10 cases of PMB have a benign cause, most often atrophic changes in the vaginal or uterine lining.
- Around 1 in 10 cases of PMB is due to endometrial (uterine) cancer, which is highly treatable when caught early.
- PMB is one of the most common ways endometrial cancer is detected. Investigation usually leads to a clear answer.
- All PMB warrants a GP appointment, not a wait-and-see approach, regardless of how light or how brief.
What postmenopausal bleeding is
Menopause is defined as 12 consecutive months without a period. Once you've reached that point, you shouldn't bleed from the vagina at all. Any subsequent bleeding, whether it's a one-off spot, a streak on toilet paper, a brown discharge, or a heavier flow that looks like a period, falls under postmenopausal bleeding (PMB).
PMB isn't always painful or dramatic. Sometimes it's so light that a woman thinks it isn't worth raising. That's exactly the bleeding that needs to be raised. GPs would rather assess a hundred women with light spotting that turns out to be benign than miss one early cancer that wasn't picked up because the bleeding seemed too minor to mention.
What can cause it
Benign causes (most cases)
The most common cause of PMB is changes in the vaginal and uterine lining that come with low oestrogen. The lining becomes thinner and more fragile, which can cause spotting after sex, after a bowel motion, or sometimes without an obvious trigger. This is sometimes called vaginal atrophy or, more accurately, genitourinary syndrome of menopause (GSM).
Other benign causes include polyps (small benign growths on the cervix or inside the uterus), fibroids, infection, certain medicines including some forms of hormone therapy in the first few months of use, and trauma to the vaginal tissue from sex or a tampon (though tampons are uncommon in this age group).
More serious causes
Around one in ten cases of PMB is due to endometrial cancer or a precursor condition called endometrial hyperplasia.
Endometrial cancer is the most common gynaecological cancer in Australia. The single most important risk factor is unopposed oestrogen, whether from medical, lifestyle or hormonal causes. Risk increases with age, obesity, type 2 diabetes, polycystic ovary syndrome, and a personal or family history of certain cancers.
The reason early investigation matters is that endometrial cancer caught early has very good outcomes. When detected at a localized stage, five-year survival is approximately 95 percent.
The window between symptoms appearing and treatment being effective is meaningful.
What your GP will do
A GP appointment for PMB will typically include:
- A detailed history: when the bleeding started, how often, how heavy, any triggers, any other symptoms
- A review of medications, including any hormone therapy
- A physical examination, which usually includes a pelvic examination and a speculum exam
- A cervical screening test if one is due
- A referral for a pelvic ultrasound, often a transvaginal ultrasound, to assess the thickness of the endometrial lining and look for polyps or fibroids
- Possibly a referral to a gynaecologist for a hysteroscopy and endometrial biopsy, particularly if the lining is thickened or the bleeding is recurrent
Many women complete this workup and end up with a benign explanation. Some need a procedure to remove a polyp or to investigate further. A small number are diagnosed with something more serious, which is exactly why the pathway exists. The investigation isn't a sign that anything is wrong, it's how a clear answer is reached.
What to bring to the appointment
Useful information to bring:
- The date of your last period before menopause, and the date the current bleeding started
- How the bleeding has behaved since (one-off, intermittent, ongoing)
- Any other symptoms: pain, change in bowel habits, urinary symptoms, unintended weight loss, vaginal dryness
- A list of current medications, including supplements and any hormone therapy
- A summary of family history of cancers, particularly endometrial, ovarian, breast or bowel
- Your most recent cervical screening result if you know it
Common questions
What if it was only one episode?
Single episodes still warrant assessment. A one-off doesn't rule out anything important, and the fact that it stopped doesn't change the recommendation.
What if I'm on menopausal hormone therapy?
Some women on certain forms of hormone therapy experience light bleeding, particularly in the first few months. Even so, any bleeding after menopause should be reviewed by your prescriber, because the response depends on the regimen, the timing and your overall picture. Don't assume it's just the therapy without checking.
Should I worry?
The honest answer is: don't catastrophise, but don't ignore. Most causes are benign. The reason for the prompt referral pathway is to identify the cases that aren't, while reassuring the rest. Knowing what's going on, one way or another, is better than worrying without information.
When to seek care urgently
See a GP within a few days for any postmenopausal bleeding. Seek care urgently (emergency department or after-hours) for:
- Heavy bleeding, soaking through pads
- Severe pelvic or abdominal pain
- Bleeding with fever or feeling unwell
- Bleeding with significant dizziness or fainting
A final note
Postmenopausal bleeding is one of the more important symptoms a woman can present with, and one of the most likely to be caught quickly with a simple GP visit and pelvic ultrasound. The pathway exists precisely because early identification saves lives. The right response is to book the appointment, attend the investigations, and trust the process. If everything checks out, that's a good day. If something needs treatment, you've caught it at the best possible time.
If you'd like to talk to an Australian clinician about your symptoms, the Chemist2U Menopause Program connects you with a partner clinician for a private consultation. Where investigation is needed, your clinician will guide you through the right pathway.
References
- RACGP: Postmenopausal bleeding: a guide for GPs
- Cancer Council Australia: Endometrial cancer
- Australasian Menopause Society: Postmenopausal bleeding
- Healthdirect Australia: Postmenopausal bleeding
- Jean Hailes for Women's Health: Bleeding after menopause
