Essential Tremor is the most prevalent and common tremor. This is most common individuals ages 65 and older. This occurs when there is an issue with the nerves that are connected to certain muscles in the body. This can also occur with disorders such as Dystonia and Parkinson's. A physical exam from a doctor can help with the diagnosis. If there is shaking with movement more than 5 times per second then Essential Tremor may be the cause. There is usually no coordination or mental conditions associated with Essential Tremor.