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.
What Causes Eye Flickering: Eye flickering or eye twitching is quite common among people. 1  Usually, the bottom eye lid is the one that is involved in twitching, but quite often the top eye lid may also begin to twitch. 2  This flickering or twitching can be very annoying.