Which factors are known to potentially worsen essential tremor?

Essential tremor is a neurological disorder characterized by involuntary shaking, most often in the hands, and can be exacerbated by various factors. Stress is particularly known to heighten the severity of tremors. When an individual experiences stress, the body's physiological response can increase muscle tension and autonomic activity, potentially leading to more pronounced tremors.

While alcohol consumption is commonly reported to temporarily reduce tremor severity in some patients, it does not worsen the condition. Caffeine is generally considered a stimulant that might aggravate tremors, but its direct impact can vary among individuals. Diet, including protein intake, has not been definitively linked to worsening essential tremor.

Therefore, stress stands out as a well-established factor that can aggravate tremors in those already affected by essential tremor, making it the most appropriate answer in this context.