Hand tremors — involuntary shaking or trembling — can have many causes, ranging from mild and temporary to signs of serious diseases. Here’s a clear breakdown:

1. Essential Tremor

• The most common cause of chronic hand shaking.

• It’s a neurological disorder, not linked to other diseases.

• Tremors usually get worse with movement (like reaching for a glass) and may run in families.

2. Parkinson’s Disease

• A progressive brain disorder that affects movement.

• Tremors typically start on one side, even when the hand is at rest (resting tremor).

• Often accompanied by stiffness, slow movements, and shuffling walk.

3. Multiple Sclerosis (MS)

• An autoimmune disease where the immune system attacks the nervous system.

• Tremors can occur because of nerve damage in areas that control movement.

• May come with weakness, balance problems, or vision issues.

4. Stroke

• If a stroke damages parts of the brain that control movement, hand tremors can develop.

• Tremors usually occur on one side and may be accompanied by weakness or speech problems.

5. Traumatic Brain Injury

• Past head injuries can sometimes cause long-term tremors if certain brain areas are affected.

6. Thyroid Disorders (Especially Hyperthyroidism)

• An overactive thyroid speeds up your body’s metabolism, which can cause fine shaking of the hands.

• Other signs: weight loss, fast heartbeat, feeling jittery or sweaty.

7. Huntington’s Disease

• A rare genetic brain disorder that causes uncontrollable movements, including tremors.

• Symptoms usually start in mid-adulthood and worsen over time.

8. Peripheral Neuropathy

• Damage to the nerves outside the brain and spinal cord, often from diabetes, alcohol abuse, or vitamin deficiencies.

• Can cause tremors, numbness, tingling, or weakness in the hands.

9. Liver or Kidney Disease

• Toxins can build up in the blood when these organs don’t work properly, leading to tremors (especially called “asterixis” in severe liver failure).

10. Anxiety Disorders

• Severe anxiety or panic attacks can trigger temporary hand shaking due to adrenaline rushes.

11. Medication Side Effects

• Drugs like asthma inhalers, antidepressants, mood stabilizers (like lithium), and some seizure medications can cause hand tremors as a side effect.

Important:

Trembling hands don’t always mean serious disease.

• Temporary tremors can also come from fatigue, caffeine, low blood sugar, or stress.

• However, new, persistent, or worsening tremors should always be evaluated by a doctor.