Mercer-Bucks Orthopaedics
Mercer-Bucks Orthopaedics
Mercer-Bucks Orthopaedics

Patient Education

What is Trigger Finger?

Trigger finger (also known as Stenosing Tenosynovitis) is the feeling you get when your finger locks or catches when bending or straightening it. It typically affects the ring finger or the thumb most often but can happen in other fingers as well. Symptoms occur without any injury occurrence and can begin after repetitive activities using the grasping or pinching motion.

The tendon passes through a “tunnel” in the finger called the tendon sheath. There are also pulleys along the finger that keep the flexor tendons close to the bone. This allows for a smooth movement while the finger is bending and straightening. The pulley at the base of the finger can become inflamed and causes the tendon to get stuck while moving through the sheath.

Trigger Finger


Cause: There is not a specific known cause, however there are secondary conditions that could contribute to Trigger Finger.