Passing big blood clots during your period
See a doctor about this one
See a doctor about this one. It is a symptom that needs a cause found, and no remedy on this site is a substitute for that.
You go to the toilet and a lump of blood drops out. Some lumps are small and dark. Others are the size of a grape or bigger, and look like raw liver.
Small clots on your heaviest one or two days are common. Clots bigger than a grape, or a lot of them, point to a heavy flow.
Heavy flow also means soaking a pad or tampon in an hour, needing two at once, or bleeding past seven days. It can wear you out and drop your iron.
When to see someone
Go to the emergency room now if you soak one pad an hour for two hours in a row. Go if you pass a clot the size of a lemon. Go if you feel faint, your heart races, or you cannot catch your breath.
Get care the same day if you could be pregnant. Bleeding with clots can be a sign of a lost pregnancy. Sharp pain on one side needs care right away.
Any bleeding after menopause needs a check. Most of the time it is not cancer. But it must be looked at to rule cancer out.
Call your doctor this week if clots are bigger than a grape most months. Call if your period lasts more than seven days. Call if you bleed between periods or after sex.
Book a visit if you feel pale, worn out, or winded on stairs. Those are signs of low iron. A simple blood test can show it.
Also book a visit if the pain keeps you in bed, or you miss work or school. Pain that bad is not something to ride out. It points to a cause worth finding.
Why it happens
Period blood has a built-in clot-buster in it. That is what keeps the flow runny most of the time. When you bleed fast, the clot-buster runs out.
Blood then sits still long enough to set into a lump. That is what you pass.
Clots are often worst in the morning, or after you sit a long time. Blood pools while you stay still, sets, then drops out when you stand. So clot size mostly tracks how fast you bleed.
What else it could be
Clots are a sign, not a cause. The real question is why the flow got so heavy. Here is how the common causes differ.
Fibroids are growths in the muscle wall of the womb. They are most common in the 30s and 40s. They tend to bring long, heavy periods, a full or heavy feeling low down, and more trips to pee.
Adenomyosis is when lining tissue grows into the womb wall. The clue is deep, dragging pain along with the heavy flow. The womb may feel sore and may feel larger.
Polyps are small soft tabs of lining. They often cause spotting between periods or after sex, on top of clots.
Perimenopause shifts the whole pattern. Cycles bunch up, then spread out. A month with no egg release lets the lining build thick, and it comes out in lumps.
PCOS or skipped ovulation can do the same at any age. The clue is a gap of many weeks, then a flood.
A copper IUD often makes flow heavier for the first few months. A hormone IUD usually does the opposite and makes flow lighter.
A bleeding disorder such as von Willebrand disease is often missed for years. Clues are heavy periods since your very first one, easy bruises, nosebleeds, and heavy bleeding after dental work. It often runs in the family.
Thyroid trouble, blood thinners, and low iron itself all add to heavy flow. Low iron makes bleeding heavier, which drops iron further. That loop needs breaking with care from a doctor.
A lost pregnancy can look like a heavy period with clots and cramps. It often comes late, after a missed period. If there is any chance at all of pregnancy, taking a test is one way to rule it out.
Bleeding after menopause is not a period. It needs a check, even if it is light and stops on its own.
How to read the grades below
The options below come from our page on Heavy Menstrual Bleeding. Each one carries two labels.
The first label is the evidence grade. A means strong trials in people, B means smaller or mixed studies, and C means early or limited findings. D means lab work only, and “insufficient” means the research cannot settle it yet.
The second label is the traditional tier. T3 means long use in more than one tradition, T2 means long use in one, and T1 means known use. T0 means no such record.
These grades come from research on Heavy Menstrual Bleeding, the parent Health Topic, not on passing big blood clots during period.
A grade tells you how strong the research is, not how well something will work for you. Talk to a doctor or pharmacist before you start anything, above all if you take other medicines.
What to try first
Start by keeping count. Write down how many pads or cups you soak each day. Note any clot bigger than a grape.
This log is the most useful thing you can bring to a doctor. It turns "my periods are bad" into a number. That number guides what gets tested.
Heavy bleeding drains iron. Red meat, beans, lentils, and dark greens are iron-rich foods some people lean on. Ask for an iron blood test before you buy iron pills.
Ginger has an evidence grade of A and a traditional tier of T3. Small trials in young women found it cut blood loss. It is also a long-used herb for cramps.
Boswellia has an evidence grade of A and a traditional tier of T3. It is a tree resin, also called frankincense. Most of its trial work is on pain, not on how much you bleed.
Red Raspberry Leaf has an evidence grade of C and a traditional tier of T2. That means trial proof is thin. It is used a lot in folk practice as a womb tonic.
Yarrow has an evidence grade of insufficient and a traditional tier of T3. So there are no good human trials behind it. Its use for heavy flow comes from folk practice, not from tests.
None of these can shrink a fibroid or fix a polyp. If a growth is the cause, you need a doctor. Herbs may ease pain, but the bleeding will keep coming back.
Check with a doctor first if you take blood thinners, take other drugs, or may be pregnant. Herbs can clash with drugs. Ginger and yarrow may both affect how blood clots.
How long it takes
Give any plan two or three full cycles before you judge it. Periods swing a lot month to month. One good month, or one bad one, tells you little.
Your log is one way to compare one cycle with the next. Count pads and big clots each cycle. A real change shows up as a lower count, not just a better feeling.
If there is no change after three cycles, stop guessing and get tested. Care from a doctor, such as hormone treatment, often works within one or two cycles. Iron levels take longer, often two to three months to build back.
