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 most common causes are fatigue, stress, and eye problems. Nutritional deficiencies or too much of certain substances, such as caffeine and alcohol, can also trigger twitching. Less common but more serious causes of an eyebrow twitch include dehydration, diabetes, and anemia, among other disorders.