Bleeding on HRT can be unsettling, particularly if your periods had stopped before treatment began. In many cases, it is a recognised effect of starting, changing or missing hormone replacement therapy. However, bleeding should never simply be ignored. The pattern, timing and amount of bleeding help determine whether your HRT needs adjusting or whether you need further assessment.
This article focuses on HRT prescribed for menopause.
Why bleeding on HRT happens
HRT replaces oestrogen, often alongside progesterone or progestogen. Oestrogen helps relieve symptoms such as hot flushes, night sweats, vaginal dryness and sleep disturbance. For people who still have a womb, progesterone is usually needed to protect the lining of the womb, known as the endometrium, from becoming too thick.
Because HRT affects this lining, bleeding can occur while your body adapts. This is sometimes called unscheduled bleeding, meaning bleeding that is not expected with your prescribed HRT regimen.
The likelihood of bleeding depends partly on the type of HRT you use. With sequential HRT, you take oestrogen every day and progesterone for part of the month. A regular monthly withdrawal bleed is expected for many people using this approach.
With continuous combined HRT, oestrogen and progesterone are taken every day. This is generally prescribed when you have been without a natural period for at least 12 months. The aim is to avoid monthly bleeding, but spotting or light bleeding can occur in the first few months.
Bleeding is more common after starting HRT, changing the dose, switching products or changing how progesterone is taken. Missed doses can also affect the balance of hormones and trigger bleeding. Sometimes the cause is unrelated to HRT, such as a cervical polyp, vaginal dryness, infection or a condition affecting the womb lining.
When bleeding can be part of settling into treatment
Light spotting or irregular bleeding during the first six months of starting HRT is common. The same can apply for a period after a significant dose or formulation change. Your clinician may advise monitoring the bleeding while ensuring you are taking treatment exactly as prescribed.
This does not mean that all bleeding in this period is automatically harmless. Keep a brief record of when it happens, how heavy it is, whether you have changed your medication and any associated symptoms. This gives your clinician useful information when deciding whether your HRT is suitable.
If you use sequential HRT, ask your prescriber what bleeding pattern to expect. Bleeding normally occurs after the progesterone phase, but patterns vary between products and individuals. Knowing what is expected makes it easier to identify a change that needs review.
When to arrange a prompt HRT review
Arrange a review if bleeding is persistent, becomes heavier, occurs after sex, or starts after you have been stable on continuous combined HRT for more than six months. You should also seek advice if bleeding begins more than three months after a change in your HRT dose or preparation.
A prompt review is particularly appropriate if you have had no bleeding for some time and it returns unexpectedly. This is especially relevant after menopause, when any new vaginal bleeding deserves assessment rather than self-management.
Your clinician will usually start by reviewing the details of your treatment. They may ask about the exact HRT product, dose, timing, missed tablets or patches, other medicines and whether you still have a womb. They will also consider factors that can influence the womb lining, including your age, weight, medical history and family history.
In some cases, adjusting the progesterone dose, changing the type of progestogen, or changing from tablets to patches or gel may settle the problem. The right option depends on your symptoms, your response to treatment and your individual risk factors. Do not stop or alter prescribed HRT without advice unless you have been told to do so by a healthcare professional.
When bleeding on HRT needs urgent attention
Seek urgent medical advice if bleeding is very heavy, such as soaking through pads rapidly, passing large clots, or causing dizziness, fainting, breathlessness or severe weakness. Severe pelvic or abdominal pain, fever, feeling acutely unwell, or a possible pregnancy also need urgent assessment.
If you have bleeding after sex alongside pelvic pain, an unusual discharge or new symptoms around the vulva or vagina, contact a clinician without delay. These symptoms often have treatable causes, but they should be assessed properly.
If you are unsure whether your symptoms can wait, contact NHS 111 for advice. For severe bleeding with collapse, chest pain, severe pain or signs of shock, call 999 or attend A&E.
What assessment may involve
Assessment is tailored to the bleeding pattern and your medical history. It may include a discussion of your HRT, a physical examination and blood tests where appropriate. Depending on the circumstances, your clinician may recommend a pelvic examination, cervical screening if this is due, a vaginal swab or an ultrasound scan.
A transvaginal ultrasound uses a small probe placed in the vagina to provide detailed images of the womb, ovaries and endometrial lining. It can help identify fibroids, polyps, ovarian cysts or changes in the lining of the womb. If the lining appears thickened, or if bleeding continues without a clear explanation, you may be referred for further gynaecology assessment. This can include hysteroscopy, where a small camera is used to look inside the womb, and sometimes a biopsy of the lining.
The purpose of investigation is not to assume the worst. Most causes of bleeding on HRT are benign and manageable. Careful assessment simply ensures that the cause is understood and that your treatment remains safe and appropriate.
Practical steps before your appointment
Bring, or make a note of, the names and doses of all HRT medicines you use. Include patches, gels, sprays, tablets, vaginal oestrogen and any progesterone. It is also helpful to record when bleeding began, whether it is spotting or similar to a period, how long it lasts and whether it follows a particular stage of your treatment.
Tell your clinician about any missed doses, recent medication changes and medicines bought over the counter. Some treatments can affect bleeding patterns or how hormones are processed. Mention a history of fibroids, endometriosis, polyps, abnormal cervical screening results, blood clots or cancer, as these may influence the safest HRT plan.
Do not put up with symptoms that disrupt your life
Some people continue with troublesome bleeding because their hot flushes, sleep or mood have improved on HRT and they worry that raising the issue will mean stopping treatment altogether. Often, that is not the case. A structured review can identify whether a small adjustment may improve bleeding control while maintaining relief from menopausal symptoms.
Specialist menopause clinics here at Clinic 360 offer rapid access for patients who want a clear discussion of new symptoms, medication review and advice on the appropriate next step. No GP referral is necessary. Where specialist gynaecology assessment or imaging is needed, you can be guided towards the right pathway without unnecessary delay.
Bleeding may be a temporary part of adjusting to HRT, but your experience matters. Record what is happening, seek advice when the pattern changes, and give yourself the reassurance of a plan based on individualised treatment.