trigger thumb – MySymptom

What does it mean when your thumb joint locks into a bent position?

1. Introduction When your thumb joint locks into a bent position, it is almost exclusively the result of a condition known as trigger thumb, clinically termed stenosing tenosynovitis. This structural issue occurs when the flexor tendon, which pulls the thumb downward, develops a swollen nodule that becomes mechanically stuck beneath a tough, fibrous sheath at … Read more

What causes the thumb joint to lock in a bent position?

1. Introduction The thumb joint locks in a bent position primarily due to stenosing tenosynovitis, clinically known as trigger thumb. This condition occurs when the flexor tendon sheath becomes inflamed and thickens, preventing the tendon from gliding smoothly through the A1 pulley at the base of the thumb. As the tendon attempts to slide through … Read more