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 of hand or finger cramps or spasms are muscle spasm, diabetes, and carpal tunnel syndrome. Other possible causes, such as multiple sclerosis, are more rare. Muscle spasm 14. Diabetes 8. Carpal tunnel syndrome 6. Chronic pain disorder 6. Trigger finger (finger disorder) 6. Lumbago 5.