The short answer: the most likely reason for bleeding after menopause is a thin, dry lining of the womb or vagina (atrophy), followed by small, usually harmless growths called polyps. Cancer of the womb lining (endometrial cancer) is found in about 5–10% of women with this bleeding. That is a minority, but it is the reason every episode, even a single spot, is checked by a gynaecologist rather than watched.
In Hindi this is often searched as menopause ke baad bleeding kyon hoti hai (मेनोपॉज़ के बाद ब्लीडिंग क्यों होती है). Below are the 7 most likely causes, from most to least common. The percentages are rough guides that vary between studies; only an examination and tests can find the cause in your case.
On this page
Causes, from most to least common
1. Thin womb lining — endometrial atrophy (~40%)
The most common cause. After menopause, lower hormone levels make the womb lining (endometrium) thin and fragile, and it can bleed on its own. It is usually seen on the ultrasound as a thin lining (4 mm or less); a biopsy is needed only if the lining is thicker, looks unusual, or the bleeding comes back. Treatment: vaginal estrogen if there are symptoms, otherwise simply watching.
2. Womb polyps — endometrial polyps (~20%)
Small, usually harmless (benign) growths from the womb lining that can bleed on and off. Found on ultrasound and confirmed with a thin camera passed into the womb (hysteroscopy). Usually removed during the same hysteroscopy (hysteroscopic polypectomy), often as a day procedure.
3. Thickened womb lining — endometrial hyperplasia (~15%)
The lining has grown thicker than normal, often linked to extra weight or to estrogen without the balancing hormone progesterone. One type, with abnormal cells (atypical hyperplasia), can turn into cancer if untreated. Diagnosed by a small sample of the lining (endometrial biopsy). Treatment depends on the type — a progestogen hormone, or removal of the womb (hysterectomy).
4. Womb-lining cancer — endometrial cancer (about 5–10%)
About 5–10% of women with bleeding after menopause are found to have endometrial cancer — one possible cause, not the usual one. Because bleeding tends to appear early, it is often found at stage 1, when it is highly treatable. Read more on when bleeding may be related to uterine cancer.
5. Cervical lesions (~5%)
Polyps on the neck of the womb (cervix), a harmless red patch on the cervix (ectopy), or rarely cervical cancer. These can be seen when the doctor gently examines with a speculum. Make sure your cervical screening (Pap/HPV test) is up to date.
6. Atrophic vaginitis (~5%)
After menopause the vaginal skin becomes thin and dry, and can bleed with rubbing, such as during sex. Treatment: a vaginal moisturiser or vaginal estrogen.
7. Hormone therapy / medication effects (~5%)
Hormone replacement therapy (HRT), blood thinners (anticoagulants) and tamoxifen can all be linked to bleeding. Tell your doctor about every medicine you take, and do not stop any of them on your own.
Standard investigation pathway
Not every woman needs every step — many need only the scan. The tests used to assess bleeding after menopause are explained step by step on a separate page; in short:
- Questions about the bleeding and your medicines, and a gentle pelvic examination
- Internal (transvaginal) ultrasound to measure the womb lining — 4 mm or less is reassuring (cancer risk under 1%)
- A small sample of the lining (endometrial biopsy), only if the lining is over 4 mm, looks unusual, or bleeding comes back — done in the clinic in under 5 minutes, results in about 1–2 weeks
- Hysteroscopy (a thin camera inside the womb) if the biopsy is not possible or not enough, or a polyp is suspected
- MRI or further imaging if cancer is diagnosed
When to act urgently
Heavy bleeding, bleeding with pain, bleeding with fever, or any postmenopausal bleeding in a woman with a strong family history of gynaecological cancers — these warrant prompt evaluation. For other cases, an outpatient appointment within 2 weeks is appropriate.
See postmenopausal bleeding overview, endometrial cancer, 6 warning signs of endometrial cancer.
FAQs
Is one episode of spotting really worth investigating?
Yes. Even a single episode of bleeding after menopause should be checked. Most women turn out to have a harmless cause; about 5–10% are found to have womb-lining cancer, which is highly treatable when found early.
Will biopsy hurt?
Endometrial biopsy causes brief crampy discomfort, like period pain, lasting 1–2 minutes. The whole test takes under 5 minutes and most women manage it well. Taking a simple painkiller such as ibuprofen beforehand can help — check with your doctor first.
What if biopsy is normal?
If the biopsy is normal but bleeding continues, the next step is usually a hysteroscopy (a thin camera inside the womb) with a sample taken from any area that looks abnormal. A small single spot can sometimes be missed by the standard biopsy, which samples without seeing.
I'm on HRT — is bleeding normal?
Sequential combined HRT can cause monthly withdrawal bleeding (similar to a period). Continuous combined HRT can cause irregular spotting in the first 6 months. After 12 months on HRT, any bleeding warrants evaluation.
Can stress cause bleeding after menopause?
Stress can upset periods before menopause, but after menopause bleeding should not be put down to stress without a check. A scan usually finds the real cause, which is most often harmless.
How quickly can I get evaluated?
Most centres offer outpatient appointments within 1–2 weeks for postmenopausal bleeding. Dr. Nishtha’s team offers WhatsApp triage and prompt scheduling.
Reviewed by Dr. Nishtha Tripathi Patel, MBBS, DGO, DNB, Fellowship Gynaecological Oncology, ESGO-certified. To book: WhatsApp +91 76988 00333.