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.
Trigger Thumb is almost exactly the same as Trigger Finger. Trigger Finger Causes. MayoClinic.com says this: The cause of trigger finger is a narrowing of the sheath that surrounds the tendon in the affected finger. I disagree. I think that a narrowing of the sheath is a -symptom- of something. Tendon sheaths don't just narrow for no reason.