Medically reviewed by Dr. Sarim Mir, board-certified neurologist at Mir Neurology.
A trembling hand is unsettling — and one of the first worries people have is whether it means Parkinson’s. In fact, the most common cause of hand tremor is a different condition called essential tremor. The two can look similar but differ in important ways. Here’s how to tell essential tremor and Parkinson’s apart, and when to see a neurologist about shaky hands.
What causes hand tremor
A tremor is a rhythmic, involuntary shaking. Many things can cause it — caffeine, stress, certain medications, and fatigue among them — but when tremor is persistent, the two conditions neurologists most often consider are essential tremor and Parkinson’s disease. The good news: identifying which one you have guides effective treatment.
Essential tremor: features
Essential tremor is an action tremor — it appears when you’re using your hands, such as writing, eating, or holding a cup, and tends to ease at rest. It often affects both hands, can involve the head or voice, frequently runs in families, and may temporarily improve with a small amount of alcohol. It’s typically not a sign of a more serious brain disease.
Parkinson’s tremor: features
Parkinson’s tremor is classically a resting tremor — most noticeable when the hand is still, like resting in your lap, and it often improves with movement. It frequently starts on one side, may look like a “pill-rolling” motion of the thumb and fingers, and is usually accompanied by other signs such as stiffness, slowness of movement, or changes in walking. Learn about our Parkinson’s disease care.
Key differences (rest vs. action)
The single most useful clue is when the tremor appears: essential tremor shows up with action, while Parkinson’s tremor shows up at rest. Parkinson’s also brings other motor changes that essential tremor doesn’t. Still, the overlap can be tricky, which is why a specialist evaluation matters. Read more about tremor evaluation.
Other causes to rule out
Not every tremor is essential tremor or Parkinson’s. Overactive thyroid, certain medications, anxiety, and excess caffeine can all cause shaking. Part of a neurology evaluation is ruling these in or out so treatment targets the real cause.
How a neurologist diagnoses tremor
There’s no single blood test for tremor — diagnosis is based on a careful history and neurological exam, observing the tremor at rest and in action, and reviewing your other symptoms. Sometimes additional testing is used to exclude other causes. As movement disorder specialists, our team can pinpoint the type and recommend treatment. If shaky hands are affecting your life, book an appointment or call (301) 797-7600.
Frequently asked questions
Is hand tremor always Parkinson’s?
No. The most common cause of hand tremor is essential tremor, which is different from Parkinson’s. Many tremors are not Parkinson’s at all.
What’s the difference between rest and action tremor?
A rest tremor appears when the hand is still and is typical of Parkinson’s; an action tremor appears during movement and is typical of essential tremor.
Can essential tremor be treated?
Yes. Several treatments can reduce essential tremor and improve daily function. A neurologist can recommend the right option for you.
When should I worry about a tremor?
See a neurologist if a tremor is persistent, worsening, affecting daily tasks, or accompanied by stiffness, slowness, or changes in walking.
Need to talk to a neurologist about this?
Mir Neurology offers same-week appointments in Hagerstown & Cumberland, MD. No referral needed for most plans.
