Thumb tremor constantly for 3 years

[ahp35]

My right thumb has had a tremor for the past 3 years.  You can actually see the movement occurring between my thumb and index finger.  At times, my right bottom eye lid also tremors.  My thumb tremor never stops, it's 24/7.  I have seen two neurologists.  One diagnosed me with continuous partial epilepsy and the other said stress/anxiety.  I have had one MRI with contract, evoked potentials and a nerve test (cannot remember the name)  all were normal. I am otherwise healthy.  My eyes sometimes bother me, but I think it has do with my sinuses. I am looking for any guidance.  I always wonder if I just live with it and stop causing anxiety by thinking about what it could be or continue to seek an answer.  Thank you so much for your time.

[Dr. Kokil Mathur]

Hi!
I am sorry to hear about your medical problems.  Dehydration and electrolyte imbalance, muscle fatigue, pinched nerve due to wrong posture could be the cause in your case. Try and use the correct posture while sitting and using computers etc.
Consult a physical therapist regarding some stretch exercises which you can perform to help relieve tension.
If this does not help, then I would suggest you get the blood levels of the following checked if they have not already been checked: potassium, calcium, sodium, magnesium, vitamin B complex, or vitamins B1, B3, or B6 and Vitamin D.
Stress, alcohol, caffeine and fatigue all cause similar symptoms. Hence if you take alcohol or coffee then cut this down. Sleep at regular hours and see if it helps. Certain sleep disorders and peripheral nerve disorders due to diabetes, Lyme's, lupus or hypothyroidism can also be the cause. It can be benign fasciculation syndrome if all causes are ruled out.
Please consult your doctor regarding this. Hope this helps. Take care!

The medical advice given should not be considered a substitute for medical care provided by a doctor who can examine you. The advice may not be completely correct for you as the doctor cannot examine you and does not know your complete medical history. Hence this reply to your post should only be considered as a guiding line and you must consult your doctor at the earliest for your medical problem.

[ahp35]

Hoping to get an answer to my question.  Thanks so much.