A fine tremor that shows up under stress, after coffee, or seemingly from nowhere — usually benign, but with a few medical causes worth excluding before anything else.
Rule out medically, first
Before any psychological explanation: hyperthyroidism produces exactly this fine tremor and is easily confirmed with a TSH. Other causes to exclude first: high-dose caffeine, nicotine, medicines (bronchodilators, lithium, valproate, some antidepressants, corticosteroids), hypoglycaemia, and alcohol withdrawal — which can cause severe tremor and is a medical emergency. Essential tremor is a common benign neurological condition, often with a family history, which worsens on movement rather than at rest. **A tremor present at rest that eases with movement, especially an asymmetric one, needs a neurological opinion — it is a different picture and is not self-diagnosed.**
What is actually happening
Physiological tremor exists in everyone — a hand is never perfectly still. It becomes visible when amplified, and adrenaline is the most efficient amplifier the body has.
Which is why it appears with anxiety: the sympathetic nervous system prepares the musculature for action, and the raised tone makes the oscillation visible. It is the same mechanism as in cold or after hard exertion, only the trigger differs.
What complicates matters is the attention loop. Once noticed, the tremor becomes an object of monitoring, monitoring raises anxiety, and anxiety raises the tremor. In someone afraid it will show — during a presentation, signing something, holding a coffee — the loop closes on itself and becomes the main driver.
What it could be
Several possibilities, because this list is not a diagnosis. What separates them is in the detail below each.
Caffeine, nicotine or a medicine
How to tell
The most common cause and the easiest to test: cutting back for a week answers the question with no appointment. Four coffees a day produce tremor in plenty of people with no anxiety at all.
Acute arousal — anxiety or a panic attack
How to tell
It appears in identifiable situations, alongside a fast pulse, sweating and shallow breathing, and stops when the situation passes. It is not there in the morning, in quiet.
Continuous background anxiety
How to tell
The tremor is slight but nearly constant, alongside muscle tension, poor sleep and worry that will not stop. Here the tremor is one symptom among several rather than the problem.
Essential tremor
How to tell
It shows on action — holding a spoon, writing, raising a glass — and not at rest. Often present in a parent too, it increases with age and paradoxically eases with a small amount of alcohol.
Fear of being seen shaking
How to tell
The tremor appears exactly in the situations where it matters that it should not — signing a document, holding a glass in public, presenting — and disappears at home. Here the main problem is no longer the tremor but the social anxiety around it.
What helps now
Order matters: first exclude causes, then work on the loop.
Test the caffeine. A week under two cups, at fixed times. It is the cheapest experiment on the list and resolves a surprising number of cases.
Ask for a TSH. One test rules out the most frequent medical cause of this symptom.
Don't hide your hands. Keeping them under the table, in pockets or clenched is a safety behaviour: it lowers anxiety in the moment and strengthens it long term, because you never find out that nothing would have happened.
Breathe out longer than you breathe in. Four seconds in, six to eight out, for a minute. A prolonged out-breath activates the parasympathetic system and directly reduces adrenergic amplification.
Check what you think it means. “Everyone can see it and thinks I'm incompetent” is the assumption that keeps the loop running. It is usually far less visible than it feels from inside.
When to get help
See a doctor if the tremor is new and persistent, if it appears at rest, if it is clearly asymmetric, if it comes with stiffness, altered walking or weight loss, or if it appears on stopping alcohol. Book a psychological assessment if it limits what you do — if you avoid signing in public, holding a glass, or speaking in front of anyone. **If thoughts of not wanting to live appear, call 112 — now, not after an appointment.**
This page is informational and is not a diagnosis. It does not replace a medical or psychological assessment. If you are in immediate danger, call 112.
Not sure which it is?
That's fine — you shouldn't be, from a page. A 15-minute call is the simplest way to find out what comes next.