Familial tremor is a neurological disorder that causes involuntary shaking. It can be present in any part of your body, however the trembling happens usually in your hands, particularly when you do simple movements like drinking from a glass or holding something.
An essential tremor is generally not a risky condition, however it may worsen after some time and can be extreme in certain individuals. Different conditions don’t cause essential tremor, though it can be mistaken for Parkinson’s disease.
Essential tremor can happen at any age however is generally common in individuals ages 40 years and above.