Bleeding After Menopause: When to Worry and What to Do

What 'Postmenopausal' Actually Means Here

Menopause is officially defined as 12 consecutive months without a period. So postmenopausal bleeding means any vaginal bleeding that shows up after that 12-month mark. Even a tiny amount. Even once. That's the line.

Why does the line matter? Because your uterus no longer has a monthly biological reason to bleed. When it does anyway, something has changed in the tissue — and that change needs a diagnosis, not a wait-and-see attitude. Don't talk yourself out of calling just because it was light or because you feel fine otherwise.

A common mistake is assuming the bleeding came from somewhere other than the uterus. It might have — the bladder, rectum, or vaginal tissue can all be sources. Your doctor will sort that out. Your job is just to report it.

The Most Common Causes (Most Are Benign)

Here's the reassuring part. The majority of postmenopausal bleeding — somewhere around 90% — turns out to have a non-cancerous explanation. Endometrial atrophy is the single most common cause. That means the uterine lining has thinned out so much from low estrogen that it becomes fragile and bleeds on its own. Think of it like dry, cracked skin, but on the inside.

Endometrial polyps are another frequent culprit. These are small, finger-like growths on the inner lining of the uterus. They're almost always benign, but they can cause unpredictable spotting. Uterine fibroids can do the same, though fibroids typically cause more trouble before menopause than after.

Vaginal atrophy — now more often called genitourinary syndrome of menopause (GSM) — affects a lot of postmenopausal women. The vaginal walls thin and lose moisture, and even minor friction can cause small bleeds. If you're on hormone therapy and your dose gets adjusted, or if you missed doses, that shift can also trigger some breakthrough bleeding.

• Endometrial atrophy (thinning of the uterine lining)
• Endometrial or cervical polyps
• Vaginal atrophy or GSM
• Hormone therapy dose changes
• Uterine fibroids (less common postmenopause)
• Endometrial hyperplasia (thickening, sometimes precancerous)
• Endometrial cancer (~10% of cases — why workup matters)

The One Cause You Can't Ignore

Endometrial cancer. It accounts for roughly 1 in 10 cases of postmenopausal bleeding, and postmenopausal bleeding is actually its most common early warning sign. That's why the medical standard is to investigate every single case — because catching it early makes a massive difference in outcome.

Risk factors include obesity, diabetes, hypertension, never having been pregnant, a history of polycystic ovary syndrome, and taking estrogen without a progestogen to balance it. If you have several of these, that's not a reason to panic, but it is a reason to be especially prompt about getting evaluated.

The goal isn't to frighten you. It's to make sure you don't rationalize away a symptom that your doctor genuinely wants to hear about. Most women who get worked up for postmenopausal bleeding leave with a benign explanation and a treatment plan. But the ones who do have something serious are far better off because they came in.

What Your Doctor Will Actually Do

Expect a pelvic exam first. Then, almost certainly, a transvaginal ultrasound — a probe that measures the thickness of your endometrial lining. If the lining is thin (typically under 4 millimeters), cancer is much less likely. If it's thicker, or if bleeding persists, your doctor will probably order an endometrial biopsy. That's an in-office procedure where a small sample of the uterine lining is taken with a thin flexible tube. It's uncomfortable for about 30 seconds. It's worth it.

Sometimes a hysteroscopy is done — a thin camera is passed into the uterus so the doctor can look directly at the lining and remove any polyps at the same time. This might be done in the office or as an outpatient procedure under light sedation.

Bring a list of every medication you're on, including any over-the-counter blood thinners like aspirin or ibuprofen and any herbal supplements. Some of these affect bleeding. Your hormone therapy regimen — doses, how you take it, whether you've been consistent — is also information your doctor needs to hear.

How Hormone Therapy Connects to All of This

If you're on hormone therapy, bleeding can sometimes be part of the picture — especially in the first few months of starting a new regimen, or after a dose change. But that doesn't mean you skip the evaluation. Hormone therapy doesn't give you a pass on getting bleeding checked out.

Estradiol, the form of estrogen used in most hormone therapy, stimulates the uterine lining. That's why anyone who has a uterus and takes estradiol also needs progesterone — either as a separate pill or as part of a combined product. Progesterone (the bioidentical form) or synthetic progestins act as a check on the uterine lining, preventing it from growing unchecked. Without that balance, you risk endometrial hyperplasia, which is the thickening of the lining that can, over time, become cancerous.

If your current hormone regimen is causing irregular bleeding that hasn't settled down after three months, talk to your prescriber about adjusting it. Sometimes it's a dose issue. Sometimes it's the type of progestogen. There's usually a workable solution — but it needs a professional assessment, not guesswork.

Treating the Benign Causes

Atrophic changes — both endometrial and vaginal — often respond well to localized or systemic estrogen therapy. Low-dose vaginal estradiol (available as cream, ring, or tablet) can restore tissue integrity with minimal systemic absorption. For women who also have hot flashes or other systemic symptoms, systemic estradiol patches, gels, or pills may make more sense, always paired with progesterone if the uterus is intact.

Polyps are typically removed during a hysteroscopy. Once they're out, bleeding usually resolves. Fibroids in postmenopausal women often shrink on their own because they're estrogen-dependent and estrogen levels have dropped — but if they're causing symptoms, removal or other treatments are available.

Endometrial hyperplasia without abnormal cells is often treated with progesterone therapy — either cyclically or continuously — to thin out the lining and return it to a normal state. Follow-up biopsies confirm it's working. Hyperplasia with certain types of abnormal cells usually requires a referral to a gynecologic oncologist.

Practical Steps You Can Take Right Now

Call your doctor's office today. Not next week. Today. Describe what you saw — the color, amount, whether it was a one-time thing or has recurred, any pain or discharge alongside it. If your regular provider can't see you promptly, an urgent care clinic or OB-GYN walk-in can often do an initial evaluation.

Track the details. Write down when you first noticed it, how heavy it was, what color (pink, red, brown), and whether it's stopped. Note anything that might have preceded it — vigorous activity, sexual intercourse, a medication change. That information is genuinely useful to your care team.

If you're already on estradiol or progesterone, don't stop taking it on your own before your appointment. Don't adjust the dose either. Keep taking it as prescribed and let your doctor make any changes based on what the workup shows.

• Call your doctor the same day you notice bleeding
• Write down timing, amount, and color
• List all medications and supplements you take
• Don't stop or adjust hormone therapy without guidance
• Ask whether a transvaginal ultrasound will be ordered
• Follow up if bleeding recurs even after a clean evaluation

Common questions