Tremors
Tremors — involuntary shaking — have several causes. Hyperthyroidism produces a fine, rapid tremor of the outstretched hands, easily confused with essential tremor or anxiety.
Distinguishing the cause matters because treatment differs completely.
Last medically reviewed: 1 November 2025
Thyroid-related tremor
Hyperthyroidism causes a fine, high-frequency tremor — typically of the outstretched hands — driven by excess adrenergic stimulation. It usually accompanies weight loss, palpitations, heat intolerance and anxiety.
The tremor resolves as thyroid function normalises.
Other causes
Essential tremor — the most common cause — produces a slower, coarser tremor often with family history. Anxiety and panic cause situational tremor. Caffeine, stimulants, hypoglycaemia, and Parkinson’s disease also cause tremors.
Medication-induced tremor (lithium, valproate, some antidepressants) is another possibility.
Distinguishing features
Hyperthyroid tremor is typically fine and rapid; essential tremor is coarser and may have family history. Thyroid testing (TSH, free T4) is the definitive way to check — it is simple and inexpensive.
If thyroid tests are normal and tremor persists, neurological evaluation may be needed.
Frequently asked questions
Is my tremor essential tremor or thyroid?
A fine, rapid tremor with other hyperthyroid symptoms (weight loss, palpitations, heat intolerance) suggests thyroid; a coarser tremor with family history suggests essential tremor. TSH testing clarifies.
Will the tremor stop after thyroid treatment?
Yes — hyperthyroid tremor resolves as hormone levels normalise, usually within weeks of achieving euthyroidism.
Can hypothyroidism cause tremors?
No — hypothyroidism typically causes no tremor or even slows movements. Tremor points toward hyperthyroidism or other causes.
References & further reading
This page is based on established medical knowledge and guidelines from authoritative sources. Always consult a qualified clinician for personal medical advice.
Ready to discuss your thyroid health?
Book a specialist consultation — in person or by teleconsultation.