You may use a certificate of citizenship or a naturalization certificate, to prove that you are a US citizen. But both the documents are not the same. A US citizenship certificate is granted to a person who acquires or derives citizenship from his US citizen parents.
Causes Of Twitching Of Fingers And Thumb. 1  Carpel tunnel syndrome causes twitching of muscles as the median nerve through the carpel tunnel becomes compressed. 2  A less disconcerting cause is muscle cramps that happen when small muscles in the hand contract.
My left index finger has been twitching sporadically for the past week. It happens each day several times, at rest and when in use. My family has a history of Parkinson's which causes me cause for concern. My mom also had essential tremor and dystonia. I had surgery on both wrists for carpal tunnel last year.