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.
Can a twitching thumb mean something serious, even deadly? The reason a twitching thumb can really cause worry is because the thumb is a very small part of the body â a digit â and when muscles of a digit (be it a thumb, index finger or toe) twitch, the digit typically jumps.