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There are several different types of tremor, including essential tremor, drug-induced tremor, Parkinson's tremor, and tremor due to other conditions such as neuropathy (nerve pain), stroke, liver failure, multiple sclerosis, and high levels of thyroid hormone.
Tremors are caused by problems with the nerves supplying certain muscles. They may affect the whole body or just certain areas, as with hand tremor. Types of tremors include: 1  Drug-induced tremor (tremors caused by certain drugs). 2  Essential tremor (no known cause). 3  Familial tremor (runs in families).