Perimenopause flooding: when a heavy period becomes an emergency

Go to the ER now if any of these are true

• You soak through a pad or super tampon every hour for two consecutive hours or more.
• You need a tampon and a pad together and are still bleeding through both in under an hour.
• You are passing clots larger than a golf ball, or clots plus gushing flow.
• You feel faint, dizzy, breathless, or confused, your heart is racing, or your skin is pale, cold, and clammy.
• You have chest pain or your vision greys out when you stand.
• You are pregnant or might be, or you are on a blood thinner.

Take someone with you if you can, and do not drive yourself if you have felt lightheaded. If you cannot get up without the room tilting, call emergency services rather than a taxi.

Very heavy, but stable: same-day call instead

If bleeding is far heavier than your normal but you are not faint and not gushing, that is a same-day phone call to your gynecology office or a visit to urgent care. Ask specifically for tranexamic acid, a blood count with ferritin, and a plan for the next bleed. Say the sentence that unlocks urgency: "I am soaking a super pad every hour and I want this treated, not monitored."

What the hospital actually does

1. Vitals and bloods. Blood pressure lying and standing, heart rate, full blood count, ferritin, a pregnancy test regardless of how unlikely you think it is, and often a clotting screen.
2. Stabilizing the bleed. Intravenous fluids if your blood pressure has dropped, and tranexamic acid, which can be given intravenously. High-dose hormonal treatment is sometimes used to stop an acute bleed.
3. Imaging. A pelvic or transvaginal ultrasound to look for fibroids, adenomyosis, polyps, and lining thickness.
4. Sampling. An endometrial biopsy and often a cervical sample. This rules out hyperplasia and endometrial cancer. Being offered it is routine over 45, not a verdict.
5. Iron or blood. Iron infusion for significant deficiency, transfusion if haemoglobin has fallen far enough or you are symptomatic.
6. An overnight stay, sometimes. If the bleed was torrential or your counts are falling, they keep you to recheck. That is caution working correctly.

Why perimenopause does this

Progesterone usually falters before estrogen does. In cycles where you do not ovulate, there is no progesterone phase to stabilize and limit the lining, so it keeps building under estrogen and then sheds unpredictably and all at once. That is why the heaviest bleed often follows a skipped or long cycle, and why heavy bleeding travels with the other low-progesterone complaints: new anxiety, waking at 3 a.m., and worse premenstrual weeks.

Hormones are rarely the whole story, though. Clinicians work through causes with the PALM-COEIN framework, and in your 40s the structural ones are common:

• Fibroids. Extremely common by the mid-40s, and a frequent reason a bleed turns torrential.
• Adenomyosis. Lining tissue growing into the muscle wall. Classic pattern: flooding plus deep cramping plus long bleeds, and it is routinely missed for years.
• Endometrial polyps. Often invisible on transvaginal ultrasound and only found on hysteroscopy, which is why a normal scan plus continued bleeding is not the end of the investigation.
• Hyperplasia or cancer of the lining. Less common, but the reason the biopsy exists.
• A bleeding disorder. Von Willebrand disease is underdiagnosed in women, and lifelong heavy periods are a clue.
• Iatrogenic causes. Copper coils, anticoagulants, and some other medications.

The iron problem nobody mentions on discharge

You can be badly iron deficient with a normal haemoglobin, because ferritin, the storage form, empties first. Low iron on its own causes exhaustion, breathlessness on stairs, a pounding or fluttering heart, hair shedding, restless legs, brittle nails, cold hands, frequent infections, and brain fog. Every one of those gets blamed on perimenopause. Ask for the ferritin number, ask what it was, and ask what the plan is to bring it back up. Tablets work for many women; an infusion is faster when levels are very low or bleeding is ongoing.

Treatment, in the order it is usually offered

1. Iron replacement. Non-negotiable, and it runs alongside everything below.
2. Tranexamic acid on bleeding days. Reduces blood loss by roughly a third to a half. Not hormonal, taken only when you are bleeding.
3. NSAIDs. Mefenamic acid or naproxen, which reduce both flow and cramping.
4. The levonorgestrel IUD. First-line long-term medical treatment, typically a 70 to 90 percent reduction in blood loss, and it doubles as contraception and as the progestogen half of HRT. Ask for adequate pain relief or local anaesthetic at insertion.
5. Cyclical progestogen or combined hormonal contraception where suitable.
6. Hysteroscopic removal of polyps or submucosal fibroids, often the cure when those are the cause.
7. Endometrial ablation. Day case, high satisfaction, but only after the lining is sampled, only once your family is complete, and contraception must continue afterward.
8. Uterine artery embolization or myomectomy for fibroids.
9. Hysterectomy. The definitive option, and for some women, after years of anaemia and cancelled plans, the one that gives them their life back. Keeping the ovaries is usually possible.

One important caveat: estrogen-only HRT is not a treatment for heavy bleeding, and unopposed estrogen when you still have a uterus is unsafe. Estrogen always needs the progestogen partner, whether that is a tablet, micronized progesterone, or the coil.

What to say if you are told you are overreacting

Women still get laughed at in urgent care for this, which is both indefensible and common. Three sentences that reliably move a conversation:

• "I am soaking a super plus tampon and an overnight pad in under an hour and passing clots larger than a golf ball."
• "This bleeding is affecting my ability to work and I would like it investigated and treated, not monitored."
• "Please document that I requested a ferritin level, a pelvic ultrasound, and an endometrial biopsy, and the decision made today."

Documentation changes behaviour. So does bringing a written log of your last two cycles with actual product counts.