Essential tremor
The diagnosis is usually made on clinical grounds. Tremors can begin at any age, from birth to old age (senile tremor). Any voluntary muscle in the body can be affected, although tremor is most commonly seen in the hands and arms and slightly less on the neck (which makes the person's head move), tongue, and legs. A resting tremor of the hands is sometimes present. Tremor occurring in the legs may be diagnosed as orthostatic tremor.