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 finger is a snapping or locking condition of any of the digits of the hand when opened or closed. Trigger finger is medically termed stenosing tenosynovitis. Trigger finger is caused by local swelling from inflammation or scarring of the tendon sheath around the flexor tendons. These are tendons that normally pull the affected digit inward toward the palm (flexion). Usually, trigger finger occurs as an isolated condition because of repetitive trauma.