Perimenopause Spotting and Heavy Periods: What Changes, and What Is Never Normal

Polyps, fibroids and adenomyosis. Benign growths in the lining or wall of the uterus, or lining tissue within the muscle, all of which cause irregular or heavy bleeding and are common in this decade.

Endometrial hyperplasia and endometrial cancer. A lining that has become too thick, and the cancer that can develop from it. Abnormal bleeding is the most common symptom of endometrial cancer, and non-cancer causes are far more common, which is exactly why every abnormal bleed is checked rather than watched.

Thyroid dysfunction. ACOG names hypothyroidism among the conditions behind heavy bleeding, and thyroid disease overlaps with the transition in age and symptoms. Midlife or thyroid covers the overlap.

Bleeding disorders and medications. Blood thinners and aspirin can make periods heavier. A copper IUD can too, particularly in its first year.

Hormone therapy. Menopausal hormone therapy can cause irregular bleeding or spotting, and ACOG lists it among the causes of bleeding after menopause. New, heavy or persistent bleeding on treatment is not assumed to be expected. Bleeding on HRT and periods on HRT cover what is expected.

Infection, and the cervix. Infection of the uterus or cervix, and changes on the cervix itself, cause bleeding, including after sex.

Pregnancy. Still possible while periods continue, and not excluded by irregularity.

A clinician tells these apart with a history, a pelvic examination, and, depending on what they find, imaging of the uterus and a sample of the lining. None of that is possible over video.

Blood work does two useful things here and one thing it cannot. It measures the consequence of heavy bleeding: a complete blood count and ferritin show whether iron-deficiency anemia has developed, which ACOG names as a direct result of heavy periods and which produces its own fatigue, breathlessness and feeling cold. And it screens the contributors: TSH for thyroid function, a pregnancy test (hCG) whenever periods are still occurring, and clotting studies where a bleeding disorder is suspected. These belong in a baseline panel, and what blood work covers explains the markers.

What no blood test does is tell you why you are bleeding or whether the bleeding is safe. Estradiol and FSH swing through the transition and do not diagnose it, and no hormone level distinguishes a benign perimenopausal pattern from a polyp or a thickened lining. That answer comes from the uterus itself, by ultrasound and, where indicated, a tissue sample. When to test hormones in perimenopause covers what hormone testing is actually for.

ACT 2 Health is a telehealth practice and does not evaluate abnormal bleeding. There is no pelvic examination, no ultrasound and no biopsy over video. The following are assessed in person, without exception.

• Any bleeding after twelve months without a period. Always, and promptly. The most common cause is thinning of the tissues, but bleeding is the presenting symptom in the large majority of endometrial cancers, so every case is evaluated.
• Bleeding or spotting after sex. Always.
• Bleeding or spotting between periods. Always.
• Soaking through one or more pads or tampons every hour for several hours in a row, needing to double up, clots the size of a quarter or larger, or bleeding that lasts longer than a week. Contact a clinician the same day.
• Heavy bleeding with dizziness, fainting, a racing heart or breathlessness. Call 911 or go to the nearest emergency department.
• Bleeding on hormone therapy that is new, heavy or persistent. Tell the prescriber rather than waiting for the next review.

If any of these applies, the in-person visit comes before anything on this site.

Much of the anxiety around abnormal bleeding comes from not knowing what happens next. The evaluation is more ordinary than people fear.

It starts with your history: the dates and pattern in your bleeding record, medications, contraception, hormone therapy, and family history of gynecologic or colon cancer. Then a pelvic examination, which checks the cervix and vagina as sources of bleeding that have nothing to do with the uterus.

If the uterus needs a look, the first tool is usually a pelvic ultrasound, often performed through the vagina, which measures the thickness of the lining and shows polyps and fibroids. If the lining is thick or the pattern demands it, an endometrial biopsy takes a small sample through a thin tube passed through the cervix. It is done in the office and the sample goes to a lab. Where more detail is needed, a clinician may look inside the uterus directly and remove a polyp at the same time.

Most evaluations end with a benign explanation and a plan. The ones that do not are the reason the evaluation exists. What to ask your clinician has the questions worth bringing.