why do your fingers lock up
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.