You may have thought your periods would slowly fade away or perhaps just not appear one month – and that’s your official menopause. It is common for periods to change significantly in perimenopause and even after menopause, but you may be surprised, confused and disappointed to find out that you still have unexpected bleeding from time to time.
Is this normal? how does taking HRT affect bleeding? and when should you see a doctor about it?
Unexpected bleeding is not uncommon during or after the menopause transition. It can happen in all women, whether you take HRT or not. In the majority of cases, the underlying reason for the bleeding is not usually cause for serious concern, but it’s important to assess each situation individually.
Unexpected bleeding in perimenopause
Remember: ‘Menopause’ is medically defined as going 12 consecutive months without a period.
Each woman’s periods are unique to her, as is her menopause transition and experience of bleeding. The time leading up to menopause, (which can last for a couple of years or as long as a decade) is perimenopause. During this time your periods commonly start to change from how they have usually been.
If you haven’t gone 12 months straight yet without a period, you’re still in perimenopause and all bets are off as to how your periods will be. It’s fair to expect vaginal bleeding to be random and unpredictable including very heavy bleeding, barely-there periods, longer, shorter, more frequent, less frequent, absent altogether then coming back with a bang periods. And unfortunately, this is considered ‘normal’ by health professionals for this time of life but there are ways to help as we will describe.
These changes to your periods are caused by fluctuations in estrogen levels. Generally, high estrogen causes heavier, longer or more frequent periods and when the estrogen dips low – often in later perimenopause – periods tend to be lighter or missed altogether. Estrogen levels in your body can be on somewhat of a rollercoaster for months or even years during perimenopause.
This lack of predictability and worrying about heavy bleeding can be tricky to cope with. It can make both work and social life difficult and impact your health in other ways, for example, if you were to become anaemic. Speak to your doctor if your periods are negatively impacting on your health and everyday life.
Sometimes there are other reasons why bleeding changes during perimenopause, such as if you change your contraceptive method or you have fibroids. So it’s always a good idea to talk it through with a clinician; just because it may be considered ‘normal’ does not mean you have to put up with it if the bleeding is inconvenient or upsetting you.
Bleeding after intercourse or bleeding that occurs between periods should always be discussed with your doctor.
Unexpected bleeding after menopause
If you have gone more than 12 months without a period, any bleeding, heavy or light, is described as ‘postmenopausal bleeding’ and is not considered normal.
The most common cause of bleeding after menopause is still related to fluctuating estrogen levels, however, there are many other potential causes of vaginal bleeding such as fibroids, polyps, or overgrowth of the cells that line the uterus, so it’s important to be aware of these other causes too.
Very rarely, changes in the cells that line the uterus can become cancerous. Bleeding may also indicate a problem with the cervix, vulva or vagina, or more rarely, a blood clotting disorder. Or it could be due to changes in your blood because of medication you’re taking.
It is crucial to talk about any unexpected bleeding with your doctor who can consider your situation more fully.
There are lots of factors that will be considered when assessing possible causes of postmenopausal bleeding, including:
- your weight
- any history of diabetes
- any history of polycystic ovarian syndrome (PCOS)
- any personal or family history of gynaecological issues
- any pain around your pelvis
- any pain or bleeding related to having sex or risk of a sexually transmitted infection.
Your clinician will also want to know your cervical screening (smear test) history and details of any medications you may be on.
A note to consider: If you’re going to seek medical help, double check the bleeding is definitely coming from your vagina and not your anus or your urethra (where you pee from). Rectal or urinary system bleeding has very different causes and treatments to vaginal bleeding. It can also be useful to make a note of when and how much you are bleeding in case further investigations are needed.
Bleeding when taking HRT
There are two different regimes that HRT is prescribed as, generally depending on whether you are perimenopausal or menopausal.
Cyclical or Sequential HRT
If you’re still in perimenopause, you’ll probably be guided to have scheduled breaks in the progesterone part of your HRT. The aim of this regime pattern is to have a ‘withdrawal’ bleed after you stop taking the progesterone each month. This type of HRT attempts to recreate your monthly cycle while you continue to transition through to menopause.
On occasions, you may notice you bleed when you’re not supposed to be bleeding or don’t bleed when you’re supposed to in the month. This is usually nothing to worry about (as long as there is no chance of pregnancy).
Continuous Combined HRT
This is usually for women who start HRT when they’ve already gone a year without a period (postmenopausal) or for those who started on cyclical/sequential HRT but have graduated on to the continuous regime.
Continuous combined HRT involves taking the estrogen and progesterone hormones continuously with no breaks in the month and is not meant to create any bleeding, so bleeding on a continuous regime can naturally cause some concern.
Note: it is very common to experience unscheduled bleeding when moving from a cyclical/sequential regime to a continuous one.
Whichever regime you take your HRT in, bleeding is also common:
- in the first 3-6 months of taking HRT as your body gets used to the change in hormone levels in your blood
- if you increase the dose of estrogen in your HRT or you change the way that you take it (for example from patch to gel)
- if there are any changes to the progesterone or testosterone components of your HRT
- if you have forgotten to take the HRT exactly as prescribed
- if you have other illnesses or stress which can impact vaginal bleeding
- if you take other medications such as weight loss injections it can lead to some bleeding on HRT.
Tell your menopause clinician about any bleeding at your first HRT review appointment (or before if it’s particularly heavy or worrying you) and at any point afterwards. If you have been settled on HRT for some time with no problems and then you start to experience unexpected bleeding, it is important to report this.
If it’s been more than 12 months since your last period and you don’t take HRT, any vaginal bleeding must be reported to your GP. For most people, it is unlikely to have a worrying cause but it is always important to check.
Ways to manage bleeding with hormones
If it is suspected that your HRT is the cause of your bleeding – and it hasn’t settled after a few months – it’s worth talking to your menopause doctor and trying a different dose, type, or way of taking it, for example altering the dose of estrogen or changing your progesterone capsules to having a intrauterine system such as the Mirena coil fitted instead.
Levonorgestrel-releasing intrauterine systems like the Mirena are a particularly effective option for those in perimenopause or for those who experience bleeding with HRT, as they can form the progesterone part of your HRT and act as a treatment for the bleeding (and double up as a contraceptive if needed).
Discuss how to manage your bleeding with your menopause doctor and make some decisions together with the aim of minimising the bleeding and deciding if any further investigations are required. It can sometimes take a few months to find the right balance of estrogen and progesterone as it is very individualised, so patience is useful!
It is also important to assess the bleeding in the light of how your other symptoms have or haven’t improved. For example, if your hot flushes and quality of sleep have significantly improved, you may wish to tolerate some light bleeding on occasions but if the bleeding is heavier and inconvenient and you haven’t seen much improvement in other symptoms, you may want a different approach.
Investigating unexpected bleeding
Your GP or menopause doctor may wish to further investigate the cause of your vaginal bleeding by referring you for an ultrasound scan to measure the thickness of the lining of your womb (uterus). Depending on the result of this, some people are then referred for further assessment by a gynaecologist.
A hysteroscopy may be undertaken, which involves a small camera being inserted into the womb and a biopsy can be taken if necessary. Sometimes blood tests are suggested to check for anaemia, your iron levels, hormone levels and other checks.
What to do about unexpected bleeding
- Keep a record of any bleeding, when it happens, how heavy it was, how long it lasted for, as well as what point in your cycle or HRT regime it occurred.
- Tell your menopause doctor or GP about it.
- Don’t suddenly stop your HRT through panic or because you assume it is causing the bleeding. Discuss it with your doctor and make a plan together to minimise the bleeding.
- Remember any changes to your HRT can cause bleeding so give it a few months for hormones to settle after any change to your regime, dose or type of HRT and then re-evaluate.
- Try not to worry or presume bleeding might be cancerous, as this is usually not the case for most women with bleeding after menopause.
Last updated: June 2026
