>>Early onset Parkinson’ disease

relatively short onset
unilateral (suggestive of either Parkinson’s tremor or dystonic tremor)
present when the hands are in a relaxed state.(resting tremor)

>>Cerebellar syndrome

typically presents with an action tremor
features suggestive of cerebellar syndrome such as nystagmus, ataxic gait or dysarthria

>>Thyroid origin

thyrotoxic /s

>>Sodium Valproate

an exaggerated physiological tremor
would affect the hands bilaterally.

>>Essential tremor

there is often a family history of tremor,
the history is long-standing.

the advent of DAT scanning has proved useful