What it is
Shaking (tremor) is rhythmic, involuntary oscillatory movement of a body part.
Involuntary rhythmic movement of a limb or body part, ranging from benign physiological tremor to symptom of neurological or systemic disease.

At a glance
What it is
Shaking (tremor) is rhythmic, involuntary oscillatory movement of a body part.
Commonly experienced as
Evidence context
Safety
See staying safeContext
Shaking or tremor describes rhythmic, involuntary oscillatory movement of one or more body parts. It is classified by pattern: resting tremor (occurring at rest, reduced by movement — characteristic of Parkinson's disease), action tremor (occurring during movement — includes postural, kinetic, and intention tremors), and task-specific tremors. Essential tremor is the most common movement disorder, typically affecting hands and arms bilaterally during action. Physiological tremor occurs in all individuals at a low amplitude, amplified by anxiety, caffeine, fatigue, and certain medications. Pathological causes include Parkinson's disease, cerebellar disorders, hyperthyroidism, alcohol withdrawal, medication-induced tremor, and Wilson's disease in younger individuals.
The Evidence
What the evidence says about tremor — from common physiological causes to neurological conditions requiring professional assessment.
Tremor is well-studied, but cause determines care
Shaking ranges from benign physiological tremor to a sign of serious neurological or systemic conditions. Evidence-based options exist for many causes, but accurate identification of the underlying cause is essential before any approach is considered.
Tremor combined with rigidity and slowed movement may indicate Parkinson's disease. In someone with alcohol dependence, new or worsening tremor signals withdrawal risk — this is a medical emergency due to seizure risk. Tremor alongside rapid weight loss, palpitations, or heat intolerance warrants thyroid assessment. New tremor in a young person should prompt evaluation for Wilson's disease.
Essential tremor — the most common movement disorder — responds to beta-blockers and primidone in clinical trials. Parkinson's tremor is managed with dopaminergic therapy. Deep brain stimulation has strong evidence for medication-resistant cases. Focused ultrasound thalamotomy is an emerging non-invasive option. Tremors caused by thyroid dysfunction or medications typically resolve when the underlying cause is addressed.
Alcohol withdrawal tremor must not be self-managed — seizure risk makes medical supervision essential. Beta-blockers used for essential tremor are contraindicated in asthma and significant bradycardia. Anyone starting or adjusting tremor-related medication should do so under qualified medical guidance. Do not assume shaking is benign without professional assessment.
Resting tremor occurs when the body part is still and is characteristic of Parkinson's disease. Action tremors occur during movement and include essential tremor and cerebellar tremor. Physiological tremor is present in everyone at low amplitude and is amplified by anxiety, caffeine, fatigue, and certain medications. Identifying the pattern helps clinicians determine the most appropriate pathway.
Tai chi has emerging evidence for improving balance and motor control in Parkinson's disease and may modestly support tremor severity. Stress reduction practices are relevant where anxiety amplifies physiological tremor. Acupuncture is used adjunctively in some neurological presentations, though evidence remains limited. These approaches are not substitutes for professional assessment or established medical management.
A GP or neurologist should assess any tremor that is new, progressive, or interfering with daily function. If tremor is associated with other neurological symptoms, systemic signs, or occurs in the context of alcohol use, seek assessment promptly. Complementary or lifestyle approaches should only be considered alongside — not instead of — qualified professional evaluation.
Safety first
General, informational guidance — not diagnostic. A qualified practitioner can advise on your own situation.
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