Essential Tremor: Causes, Symptoms and Treatment

01Definition

What essential tremor is

Mayo Clinic describes essential tremor as a neurological condition that causes rhythmic shaking you cannot control. MedlinePlus explains that it is involuntary, meaning you shake without trying and cannot stop it at will, and that it is the most common type of tremor. Everyone has some tremor at times, but usually too small to see.

NINDS explains that the key feature of essential tremor is a tremor in both hands and arms during action, without other neurological signs. It can be mild and stay mild or slowly get worse over time. Mayo Clinic notes that it is not usually dangerous, but can be severe for some people.

02Symptoms

Typical symptoms: hands, head, voice

According to Mayo Clinic and MedlinePlus, essential tremor:

• begins gradually and is often more noticeable on one side
• worsens with movement and may be less noticeable at rest
• usually affects the hands first, making it hard to hold a cup, eat, write, draw or use tools
• can cause a “yes-yes” or “no-no” nodding of the head
• can give the voice a shaking or quivering sound if the voice box is affected
• rarely affects the legs or feet

MedlinePlus explains that the shaking usually involves small, rapid movements, 4 to 12 times a second, that may come and go. Severe tremor can make it difficult to shave, put on makeup, eat without spilling or write legibly.

03Worse

What can make it worse

The sources list factors that can make essential tremor worse:

• emotional stress, anxiety and strong emotions
• fatigue and lack of sleep
• caffeine
• extreme temperatures
• certain medicines

MedlinePlus notes that small amounts of alcohol may slightly improve the tremor, but alcohol is not a recommended treatment, because alcohol use disorder may develop. People who drink heavily should not stop suddenly without medical help, as alcohol withdrawal itself can cause tremor. If you think a medicine is worsening your tremor, talk to your prescriber rather than stopping it.

04Causes

Possible causes and family history

The exact cause is unknown. MedlinePlus explains that research suggests the part of the brain that controls muscle movements does not work correctly, and NINDS notes that studies show a mild degeneration of the cerebellum, the area that coordinates movement.

Essential tremor often runs in families. Mayo Clinic explains that about half of people with essential tremor appear to have an altered gene, inherited in an autosomal dominant way, so a child of a parent with the gene has a 50% chance of inheriting it. NINDS gives a range of 50 to 70% of cases as inherited. Genetic testing is not part of routine assessment, and family patterns vary.

05Parkinson’s

How it differs from Parkinson’s tremor

Mayo Clinic explains that essential tremor is sometimes confused with Parkinson’s disease, but they differ:

• Timing: essential tremor of the hands usually happens when using the hands; Parkinson’s tremor is most noticeable when the hands are resting
• Other symptoms: Parkinson’s disease is linked to stooped posture, slow movement and shuffling steps; essential tremor does not usually cause other health problems, although some people develop an unsteady walk
• Body parts: essential tremor mainly affects the hands, head and voice; Parkinson’s tremor usually starts in the hands and can affect the legs, chin and other areas

These differences help doctors, but no home test or single observation can reliably distinguish them; a professional assessment is needed.

06Diagnosis

How it is diagnosed

MedlinePlus explains that a doctor can make the diagnosis through a physical examination and questions about medical and personal history. NINDS adds that a neurological examination looks at whether the tremor appears at rest or during action, where it occurs, whether it affects one or both sides, and its frequency and size, along with muscle tone, strength, reflexes, balance and speech.

Tests may be needed to rule out other causes, such as an overactive thyroid, too much caffeine, smoking, certain medicines, anxiety or alcohol withdrawal. MedlinePlus notes that blood tests and brain imaging are usually normal in essential tremor. NINDS explains that tremor can also be part of other conditions, such as Parkinson’s disease, multiple sclerosis or stroke, which is why a new tremor should be checked.

07Daily life

Daily strategies and aids

MedlinePlus explains that treatment may not be needed unless the tremor interferes with daily activities or causes embarrassment. For tremor made worse by stress, relaxation techniques may help, and avoiding caffeine and getting enough sleep help with tremor of any cause. Practical aids include:

• clothes with hook-and-loop fasteners, or button hooks
• weighted utensils with larger handles
• half-filled cups, lidded cups or straws to avoid spilling
• a heavier bracelet or watch, which may reduce hand or arm tremor
• slip-on shoes and shoehorns

08Medicines

Medicines (groups, not doses)

MedlinePlus explains that the most commonly used medicines are a beta blocker, propranolol, and an anti-seizure medicine, primidone. Other options include other anti-seizure medicines, mild tranquilizers and calcium-channel blockers; NINDS confirms that beta blockers and certain anti-seizure medicines can help essential tremor in some people. Botulinum toxin injections may be tried for some tremors.

These medicines can have side effects: MedlinePlus notes that propranolol may cause fatigue, a stuffy nose or a slow heartbeat and may worsen asthma, and that primidone may cause drowsiness, poor concentration, nausea and problems with balance. The choice, dose and changes are decided by your doctor, and medicines should not be started or stopped on your own.

09Sources

Where the sources differ

The sources describe age of onset differently: Mayo Clinic (March 2025) says essential tremor is most common from age 40, MedlinePlus (May 2026) says it is most common after 65, and NINDS (July 2026) says it often first appears in adolescence or between 40 and 50. They also differ on inheritance (about half in Mayo Clinic; 50 to 70% in NINDS) and on progression: Mayo Clinic says it typically worsens over time, while NINDS notes it can stay mild.

For severe tremor that does not respond to medicines, MedlinePlus describes procedures such as focused radiosurgery or deep brain stimulation, an implanted device that sends signals to the brain area controlling movement. These are options for selected people after specialist assessment, with their own risks, not a guaranteed cure. MediBilbao Salud does not treat essential tremor; a neurologist is the right specialist.

10Summary

In summary

Essential tremor causes involuntary rhythmic shaking, mainly of the hands during action, sometimes of the head or voice. It is not dangerous but can affect daily tasks, and stress, tiredness, caffeine and some medicines make it worse. It often runs in families. Diagnosis is clinical, with tests to exclude other causes. Daily aids, medicines and, in severe cases, procedures can help.

For reviews with your doctor, it helps to note the task that matters most to you (writing, eating, drinking), how often the tremor affects it, the treatment you use and its side effects, and your goal for the next review. Any new tremor should be checked, and sudden tremor with other neurological symptoms needs urgent care.