Trigger Finger


Stenosing tenosynovitis is a condition commonly known as “trigger finger.” It is sometimes also called “trigger thumb.” The tendons that bend the fingers glide easily with the help of pulleys. These pulleys hold the tendons close to the bone. This is similar to how a line is held on a fishing rod (Figure 1). Trigger finger occurs when the pulley becomes too thick, so the tendon cannot glide easily through it (Figure 2).