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.
The common, less serious causes of muscle twitching include: 1  exercise. 2  stress and anxiety. 3  caffeine and other stimulants. 4  nutritional deficiencies. 5  smoking. 6  irritation of the eyelids or surface of your eye. 7  reaction to drugs, such as corticosteroids, stimulants, and estrogen.