The short explanation
It can be. Heavy periods can lead to iron deficiency and anaemia, and when haemoglobin is low the heart beats faster to deliver enough oxygen. This can cause palpitations, weakness, breathlessness on effort and dizziness, which may feel worse during or after your period. A simple blood test for haemoglobin and iron stores can check this. If anaemia is found, treating it and looking at the cause of heavy bleeding usually helps.
What depends on your situation
The parts of this that change from woman to woman. Uncertainty is stated, not hidden.
- Hormone changes around periods, dehydration, poor sleep and anxiety can also make the heartbeat feel faster.
- Thyroid problems can cause both palpitations and period changes, so your doctor may check thyroid function.
- If periods are very heavy, such as soaking pads every hour or passing large clots, this needs attention in its own right.
What this answer cannot determine
The boundary of online education. These need a clinician who can see you.
- This answer cannot tell whether you are anaemic or what is causing your palpitations. Blood tests and an examination are needed.
Questions for your clinician
Take these with you. You can add any of them to an appointment card.
- Should my haemoglobin and iron levels be checked?
- Could my thyroid be involved?
- What can be done about my heavy periods?
- Do I need an ECG?
When to seek help
Clinician-approved guidance for this topic. When in doubt, being seen is never the wrong choice.
Emergency — call 112 now
- Call 112 if you have chest pain, faint, or become severely breathless, or if bleeding is extremely heavy with dizziness.
Get help the same day
- Get same-day care if you feel faint or very breathless during heavy bleeding.
Book an appointment soon
- See a doctor within days for blood tests if you often feel weak and have palpitations during periods.
Sources
The evidence this explanation is built on.
- Heart palpitations NHS
- Heart palpitations MedlinePlus (US National Library of Medicine)
- Heart disease in women MedlinePlus (US National Library of Medicine)
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 (AI-assisted draft) AskHer's editorial team — not an individual clinician Works in English, தமிழ், हिन्दी
- Clinical reviewer
- Nobody yet No clinician has signed this answer off, and no person on the editorial team has read it yet. That is what the “Written with AI assistance” label means. It is queued for an editor to read, and then for a clinician who works in this area. The sources it was drafted against are listed above.
- Review status
- Written with AI assistance — not yet reviewed by a person
- Last reviewed
- Not yet reviewed by a person
- 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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