Essential Tremor: This is the most common cause of tremors in adults, especially in the elderly. It is a benign condition characterized by a postural or action tremor, often affecting the hands, head, or voice.

Parkinson's Disease: A neurodegenerative disorder that can cause tremors, rigidity, bradykinesia, and postural instability. The tremor is typically a resting tremor.
Medication-Induced Tremor: Certain medications, such as beta-agonists, anticonvulsants, and antidepressants, can cause tremors as a side effect.
Thyroid Dysfunction: Both hyperthyroidism and hypothyroidism can cause tremors, although hyperthyroidism is more commonly associated with this symptom.
Alcohol Withdrawal: Alcohol withdrawal can cause tremors, especially in individuals with a history of heavy alcohol use.

Wilson's Disease: A rare genetic disorder that can cause tremors, as well as liver disease and psychiatric symptoms. It is essential to diagnose and treat Wilson's disease early to prevent long-term damage.
Multiple Sclerosis: A demyelinating disease that can cause tremors, as well as other neurological symptoms such as weakness, numbness, and vision problems.
Stroke or Transient Ischemic Attack (TIA): A stroke or TIA can cause sudden onset of tremors, especially if the cerebellum or basal ganglia are affected.

Friedreich's Ataxia: A rare genetic disorder that causes progressive damage to the nervous system, resulting in tremors, ataxia, and other neurological symptoms.
Huntington's Disease: A rare genetic disorder that causes progressive damage to the brain, resulting in tremors, chorea, and cognitive decline.
Creutzfeldt-Jakob Disease: A rare prion disease that causes rapid progression of neurological symptoms, including tremors, dementia, and myoclonus.