You might be short of B1 and B6. Give that a try. If it doesn't help you might want to see a neurologist.
Hi there. Essential tremor is a type of involuntary shaking movement where no cause can be identified. The specific cause is unknown and could be due to cerebellum getting affected. This can also occur with dystonias, Parkinsonism, etc. certain symptoms could be head nodding, shaking of sound if tremor affects the voice box. Usually these are seen when you move and may worsen with stress, caffeine, drugs. You need to consult a neurologist for assessment. Treatment involves certain drugs like propranolol and primidone , which is an anti convulsant. Hope this helps. Take care.