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Definition
By Mayo Clinic staffEssential tremor can affect almost any part of your body, but the trembling occurs most often in your hands — especially when you try to do simple tasks, such as drinking a glass of water, tying your shoelaces, writing or shaving. You may also have trembling of your head, voice or arms.
By definition, essential tremor isn't caused by other diseases or conditions, although it's sometimes confused with Parkinson's disease. It can occur at any age, but is most common in older adults. According to the National Institutes of Health, essential tremor may affect as many as 14 percent of people over the age of 65.
