Index finger shaking: May be anxiety/ stress or benign fasiculations may be nerve irritation, fasciulations- from brachial plexus/ thoracic outlet, cervical spine , or may be more serious like MS/ALS. Check electrolytes calcium magnesium potassium, check TSH/T4 , avoid caffeine Would consider follow up with doc/neurologist for EMG/ MRI.
Answered 3/13/2016
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