I noticed my father has an involuntary head tremor, usually when he is focused on watching a program on tv, etc.  He is 71.  What usually causes this type of tremor?            
 
            
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                Was your father checked for the possibility of Parkinson's disease. I am not saying he has it but that is a symptom of it. He needs to see a neurologiest
Good luck
Portia
 
            
             
                        Good luck
Portia
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