The short explanation
Small clots are ordinary, particularly on the heaviest day and first thing in the morning. What is worth reporting is clots larger than about the size of a ten-rupee coin, clots on most days of the period, or clots that have appeared where there never used to be any.
What depends on your situation
The parts of this that change from woman to woman. Uncertainty is stated, not hidden.
- Blood clots when it sits still. On a heavy flow, there is more blood than the body's own clot-dissolving process can keep up with, so clots appear — which is why clots and heavy bleeding usually travel together and are assessed as one symptom.
- Size is the useful measure, and household comparisons work better than millilitres: a ten-rupee coin, a grape, a lemon. Clinicians ask for this because it separates ordinary from significant faster than any other question.
- Fibroids and adenomyosis both commonly cause heavy bleeding with clots, and both are common in India. Neither is dangerous in itself, and both are treatable, but they are worth identifying rather than living around.
- If clots are new for you, when they started matters — after a copper IUD, after a pregnancy, after starting or stopping a medicine.
What this answer cannot determine
The boundary of online education. These need a clinician who can see you.
- This cannot tell you whether your clots mean anything. Size, frequency and the rest of your bleeding pattern have to be taken together, and that needs a clinician.
- This does not tell you whether you need a scan. That decision depends on the examination and on your history.
- This explanation was written by AskHer's editorial team from the guidance listed under Sources. A clinician registered in India has not signed this version off yet — that is why no clinical reviewer is named at the foot of this page, and it is why nothing here is a diagnosis.
Questions for your clinician
Take these with you. You can add any of them to an appointment card.
- My clots are roughly this size and this often. Is that significant?
- Could this be fibroids or adenomyosis, and would a scan show it?
- Should my haemoglobin be checked?
- What are the treatment options if it is one of those, and what is each one for?
When to seek help
Clinician-approved guidance for this topic. When in doubt, being seen is never the wrong choice.
Get help the same day
- you are passing large clots and soaking a pad every hour or two
- you feel faint, breathless or your heart is racing
- you are pregnant, or could be, and passing clots
Book an appointment soon
- clots are regularly bigger than a ten-rupee coin
- clots are new, or have got bigger over recent months
- clots come with periods that have also become heavier or more painful
Sources
The evidence this explanation is built on.
- Heavy periods NHS
- Fibroids NHS
- Good Clinical Practice Recommendations on management of abnormal uterine bleeding in the reproductive period Federation of Obstetric and Gynaecological Societies of India
Who wrote and reviewed this
Every AskHer answer names its author. A clinically reviewed answer also names the clinician who signed it off — if no clinician is named below, it has not been clinically reviewed.
- Author
- AskHer Editorial AskHer's editorial team — not an individual clinician Works in English, தமிழ், हिन्दी
- Clinical reviewer
- Nobody yet No clinician has signed this answer off. That is what the “Editorially reviewed” badge means, and why it does not say “Clinically reviewed”. It was written and checked by AskHer’s editorial team against the sources listed above, and it is queued for a clinician who works in this area.
- Review status
- Editorially reviewed
- Last reviewed
- Last reviewed 1 September 2026
- Version
- 1
Correction history
Substantive changes are listed, not quietly edited away.
No corrections have been made since this answer was first published.
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