Trigger finger is caused by a thickening on the tendon catching as it runs in and out of the sheath. You can often feel this swelling in the palm as you move the finger. Often the finger sticks in a bent position, especially on waking in the morning. Pulling the finger straight is uncomfortable.
The flexor tendons that bend the fingers run from the forearm. In the fingers, there is a complex system of pulleys called the flexor sheath.
The tendons are lined by a layer of tissue called the tenosynovium. This allows them to glide smoothly through the various pulleys. As we age, the tenosynovium degenerates and thickens, a condition called tenosynovitis.
The steroid injection does not work immediately. It causes no general side-effects but occasionally the skin around the injection-site can be made a little thinner. Therefore two injections are the maximum.
Very rarely can the injection worsen your symptoms. If after your injection you experience significant pain you should contact the staff of the hospital.
The condition can occur in any finger and therefore the triggering may return in the affected or other fingers. This is, however, very unusual if you have had surgery.
After the operation your hand will be dressed with a supportive dressing that permits finger movement and light hand use. You will be discharged with specific instructions relating to hand exercises and wound care. Your stitches will be removed two weeks after your operation. The staff will arrange this for you before you go home.