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.
Though a lot of people think that twitching eyes are caused by stress or fatigue, the real hidden cause is dry eyes. When eyes are too dry, you involuntarily start blinking to keep them moisturized. After a while, the blinking triggers your nerves and tricks the brain into making your eyes twitch even more.