Trigger finger is caused when the sheath that encases the tendon in a finger or thumb becomes inflamed. This causes the tendon to catch on the sheath, locking the finger in place. Trigger finger is the common name for a medical condition known as stenosing tenosynovitis.
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.
The tendons work like long ropes connecting the muscles of the forearm with the bones of the fingers and thumb. In the finger, the pulleys are a series of rings that form a tunnel through which the tendons must glide, much like the guides on a fishing rod through which the line or tendon must pass. These pulleys hold the tendons close against the bone.
We present a case report of stenosing tenosynovitis of the flexor pollicis longus tendon in an adolescent girl who required surgical release after failing conservative measures. The patient had no other risk factors, aside from her excessive texting, which we postulate led to her condition. Although there have been a few reports of tendinitis and tenosynovitis secondary to texting, we believe this is the first in the literature to report trigger thumb requiring surgical release in an adolescent.
Trigger finger or thumb arises either from thickening of the flexor tendon sheath which occurs following tenosynovitis of infective, traumatic or rheumatolgical origin or from nodular thickening of the flexor tendon itself which may be congenital. In either case, smooth passage of the tendons through their sheaths is compromised, causing symptoms of delayed and sometimes painful extension of the digit commonly the middle fingerperhaps accompanied by a cracking sound. Patients commonly report having to straighten the finger physically, which otherwise remains locked in the flexed position.
A 'billable code' is detailed enough to be used to specify a medical diagnosis. Stenosing tenosynovitis also known as trigger finger or trigger thumb is a painful condition caused by the inflammation tenosynovitis and progressive restriction of the superficial and deep flexors fibrous tendon sheath adjacent to the A1 pulley at a metacarpal head. Repetitive forceful compression, tensile stress, and resistive flexion, causes inflammation, swelling, and microtrauma, that results in thickening and stenosis commonly a nodular formation of the tendon distal to the pulley leading to a painful digital base, limitation of finger movements, triggering, snapping, locking, and deformity progressively.
Back to Health A to Z. This can make it difficult to move the affected finger or thumb and can result in a clicking sensation. It usually affects the thumb, ring finger or little finger.
The tendons in your thumb and fingers are covered in a tunnel-like structure of tissues that are called sheaths. If you have trigger thumb, your tendons have become inflamed. Because of this inflammation or swelling, your tendons are no longer properly gliding through your sheaths.
Our hands connect us with the world. We work with our hands and communicate with our hands. The wear and tear from all that use can sometimes cause painful conditions, and women are particularly prone to develop two of these: de Quervain's pronounced deh-KWER-vins tenosynovitis and stenosing tenosynovitis or trigger finger.