Shaking and Tremors: What Causes Them and When to Get Checked

Shaking—or tremors—are involuntary, rhythmic movements of one or more parts of the body. Nearly everyone experiences mild shaking at times, such as a brief shiver after stepping into cold air or a nervous hand tremble before public speaking. In most cases, these episodes aren’t serious and resolve on their own. However, persistent or worsening shaking can signal an underlying health issue that deserves medical attention.

Types of Shaking

• Physiologic tremor
  A fine, rapid shaking everyone has at rest. It may worsen with stress, fatigue, caffeine or certain medications.
• Essential tremor
  A common condition often affecting the hands, head or voice. It usually starts in midlife and can run in families.
• Resting tremor
  Seen when muscles are relaxed, most famously in Parkinson’s disease.
• Action tremor
  Occurs with voluntary movement. Subtypes include:
  • Postural tremor (holding a position against gravity, e.g., arms outstretched)
  • Kinetic tremor (during movement, e.g., lifting a cup)
  • Intention tremor (worsens as you reach for a target, common in cerebellar disorders)

Common Causes of Shaking

1. Lifestyle factors

   • Stress and anxiety
   • Excessive caffeine or energy drink intake
   • Alcohol withdrawal
   • Fatigue and sleep deprivation

2. Metabolic and systemic issues

   • Low blood sugar (hypoglycemia)
   • Overactive thyroid (hyperthyroidism)
   • Electrolyte imbalances
   • Fever or infection

3. Medications and substances

   • Asthma inhalers (beta-agonists)
   • Certain antidepressants, antipsychotics or anticonvulsants
   • OTC stimulants and decongestants

4. Neurological conditions

   • Parkinson’s disease
   • Multiple sclerosis (MS)
   • Stroke or transient ischemic attack (TIA)
   • Huntington’s disease
   • Cerebellar disorders

5. Genetic and age-related factors

   • Family history of essential tremor
   • Age-related changes in the nervous system

Signs You Should Get Checked

While occasional shaking linked to stress or caffeine often isn’t dangerous, see a healthcare provider if you notice:

• Tremors that start suddenly or worsen over days to weeks
• Shaking that interferes with eating, drinking, writing or hygiene
• Tremors present at rest and during movement
• Additional symptoms like weakness, numbness, dizziness, vision changes or trouble speaking
• Fever or signs of infection alongside shaking
• Family history of neurodegenerative disease and a new tremor
• New-onset tremor in adulthood with no clear trigger

Other Symptoms to Watch For

Pairing shaking with other signs can help pinpoint the cause. Note if you also experience:

• Muscle stiffness or slow movement
• Changes in coordination or balance
• Palpitations, weight loss, heat intolerance (suggesting hyperthyroidism)
• Tremors that improve with alcohol (seen in essential tremor)
• Anxiety, panic attacks or mood changes

How a Doctor Evaluates Shaking

A thorough evaluation helps identify the root cause:

1. Detailed history

   • Onset, duration and pattern of shaking
   • Triggers (stress, caffeine, medications)
   • Family history of tremor or neurological disease
   • Associated symptoms

2. Physical and neurological exam

   • Observation of tremor at rest and with tasks
   • Assessment of muscle strength, reflexes and coordination

3. Laboratory tests

   • Blood sugar, thyroid function and electrolytes
   • Liver and kidney function

4. Imaging and specialized tests (if needed)

   • Brain MRI or CT scan
   • Electromyography (EMG)
   • DaTscan (for Parkinson’s evaluation)

Treatment Options

Treatment depends on the cause and severity:

• Lifestyle modifications

  • Reduce caffeine and stimulant intake
  • Practice stress-reduction techniques (deep breathing, meditation)
  • Ensure consistent sleep schedule

• Medications

  • Beta-blockers (e.g., propranolol) for essential tremor
  • Primidone or other anticonvulsants
  • Parkinson’s medications (e.g., levodopa) for resting tremor
  • Adjusting or stopping medications that trigger tremor

• Physical and occupational therapy

  • Hand-writing exercises and adaptive devices
  • Balance and coordination training

• Procedures (for severe, treatment-resistant cases)

  • Deep brain stimulation (DBS)
  • Focused ultrasound

When to Seek Urgent Care

Seek immediate medical attention if shaking is accompanied by:

• Sudden weakness or paralysis on one side of the body
• Severe headache, vision loss or difficulty speaking
• Chest pain or palpitations
• Confusion, difficulty waking or seizures

These could be signs of stroke, heart issues or other medical emergencies.

Track Your Symptoms Online

If you’re unsure what’s causing your shaking, consider a free, online symptom check, using the doctor approved Ubie Symptom Checker. It can help you sort through possible causes and decide whether you need to see your doctor.

Speaking to Your Doctor

Always discuss persistent or worsening shaking with a healthcare professional. Bring a list of:

• Medications and supplements you take
• Triggers you’ve noticed (e.g., stress, caffeine)
• A log of when and how often the tremors occur
• Any other symptoms you’ve experienced

This information speeds up diagnosis and leads to more targeted treatment.

Final Thoughts

Shaking and tremors range from benign to serious. Occasional, mild tremors often resolve with simple lifestyle changes. However, persistent or worsening shaking—especially when paired with other neurologic or systemic symptoms—warrants medical evaluation. Don’t hesitate to seek care or use reliable tools like the Ubie Symptom Checker to guide your next steps.

Speak to a doctor about anything that could be life threatening or serious. Your health matters, and early evaluation can make all the difference.