What happens in trigger finger?
Tendons are cord-like tissue that connect muscles to bone and therefore act as mechanical cables allowing you to move. Synovial sheaths are smooth, lubricated linings on tendons that help the tendons slide without friction. Trigger finger, also called tenosynovitis, is inflammation of a tendon and its synovial sheath in the finger (usually the index finger, but frequently the thumb in which case it is called trigger thumb). The inflammation may be due to repeated trauma, infection, or some unknown cause. The tendon and its synovial sheath become swollen and may develop scarring. Because there is obstruction as the affected parts of the tendon and sheath try to slide past each other, there is difficulty in straightening the finger. On trying a little harder the affected areas are forced to slide past each other (often with a clicking sound) and the rest of the movement is easy. Medical treatment Medical treatment consistes of rest, oral anti-inflammatory drugs (like aspirin), or steroid
