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.
A trigger finger causes a painful snapping sensation.. Orthopedics. Trigger finger is a common problem that causes pain and snapping of the tendons in the fingers. The problem that occurs in a patient who has trigger finger is due to the tendons of the fingers, and the sheath in which these tendons live.