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.
Twitching of index finger and numbness at the back of the hand could be due to carpal tunnel syndrome. The carpal tunnel (at your wrist through which the median nerve passes) changes its size depending on the position of the wrist. Itâs widest when wrist and hand are straight in line.