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.
3 doctors agreed: Physical examination: Trigger finger is caused when the space between the flexor tendon and the tendon sheath (tunnel) becomes tight. It becomes difficult to bend the finger and it may become stuck, either in flexion (bent) or extension (straight). This can be seen on physical exam.