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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.
The most common cause of non-Parkinson's tremor is essential tremor. It's a treatable condition that is often wrongly diagnosed as Parkinson's. Besides tremor, the most common symptoms include: 1  Stiff muscles (rigidity) and aching muscles. 2  Slow, limited movement, especially when you try to move from a resting position. 3  Weakness of face and throat muscles. 4  Difficulty with walking and balance. 5  FreezingFreezing, a sudden, brief inability to move.