A tremor can serve as a warning sign for some conditions, including Parkinson's disease, mercury poisoning, overactive thyroid and liver failure, notes MedicineNet. Some neurological disorders that can produce a tremor include multiple sclerosis, stroke, traumatic brain injury and a variety of neurodegenerative disorders that directly affect the functioning of the brainstem or the cerebellum. However, tremors commonly appear in humans and mostly occur in otherwise healthy individuals.
Since some tremors experienced by people of all ages have no known cause, hand tremors do not necessarily signal any further ailment, according to MedicineNet. Tremors can be a symptom of a neurological disorder, a side effect of certain drugs or an inherited trait that runs in the family of the sufferer.
Although tremors are mostly not life-threatening, a tremor is a nerve disorder characterized by uncontrollable shaking and can be embarrassing and inconvenient. If a tremor is discovered, observe it carefully before consulting a doctor, taking special care to determine what seems to aggravate or alleviate the condition, advises WebMD. For example, essential tremor occurs during everyday movements, such as lifting a cup, pointing at an object or holding a pencil; it does not cause shaking when the person is not moving.