Tremors can be caused by alcohol abuse, an overactive thyroid, a stroke, and a variety of neurological conditions. However, these tremors are not characterized as essential tremor.
The exact cause of essential tremor is unknown. Scientists haven’t found any absolute genetic or environmental causes, and no cellular defect has been linked to the condition. However, recent research suggests that essential tremor may be triggered by changes in certain areas of the brain. As with most medical conditions, research is ongoing.