The short explanation
Caffeine is a common trigger for a racing heart and shaky hands. Coffee, tea, energy drinks and some colas all contain it, and large amounts can speed up the heart and cause jitteriness, anxiety and poor sleep. Cutting down gradually usually helps. If the racing continues even after reducing caffeine, or happens with other symptoms, a doctor can check for rhythm problems, thyroid issues or anaemia.
What depends on your situation
The parts of this that change from woman to woman. Uncertainty is stated, not hidden.
- Energy drinks can contain high caffeine and other stimulants, and the effects add up quickly when combined with coffee.
- Lack of sleep, stress, dehydration and skipping meals can make palpitations worse.
- Stopping suddenly can cause headaches; reducing gradually is easier.
What this answer cannot determine
The boundary of online education. These need a clinician who can see you.
- This answer cannot check your heart rhythm. Only an ECG or monitor can show what is happening.
Questions for your clinician
Take these with you. You can add any of them to an appointment card.
- Could caffeine alone explain my palpitations?
- Should I have an ECG or thyroid test?
- How much caffeine is reasonable for me?
- What symptoms should make me come back?
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 a racing heart comes with chest pain, fainting or severe breathlessness.
Book an appointment soon
- See a doctor within days if palpitations continue despite cutting caffeine, or feel irregular.
Raise it at a routine appointment
- Mention palpitations at a routine visit if they settle after reducing caffeine.
Sources
The evidence this explanation is built on.
- Heart palpitations NHS
- Heart palpitations 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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