What Does Having a Finger or Thumb That Locks Up on You Mean?
Two to three percent of the general population and 10% of diabetics experience locking, clicking, snapping, or catching of a finger or thumb, known as Trigger Finger or Trigger Thumb, also known as stenosis tenosynovitis. It is more common in diabetics and females older than 50. The ring and long fingers are most involved. The mechanism includes the tendon of the finger getting “caught up” on the pulley of the finger. Occasionally, there may be a nodule on the tendon as well.
Other conditions that may be associated with trigger fingers, besides diabetes, are rheumatoid arthritis, hypothyroidism, gout, and carpal tunnel syndrome. Greater than 60% of people with trigger fingers also have clinical evidence and positive nerve tests for carpal tunnel syndrome. Both hands and multiple fingers can be involved with those diagnosed with diabetes.
Once the triggering starts, it generally progresses. It becomes more frequent and more painful. Some people may find that the finger locks in a flexed position and must be manually manipulated to extend it. The tenderness is generally over the A1 pulley at the base of the finger on the palm side of the hand. Trigger finger is diagnosed by physical examination.
Conservative treatment with splinting, modification of activity, and nonsteroidal anti-inflammatories, like Ibuprofen, may relieve symptoms in 40-97% of cases. The best initial treatment recommended is a steroid injection, which can offer relief in 60-90% of cases. The effectiveness of the injection decreases the longer the symptoms have been present. There may also be less effectiveness in diabetics. It is important to know that blood glucose levels and blood pressure readings may be elevated for a few days to a week, after receiving a steroid injection.
Surgical release of the trigger finger is an option for failed non-operative treatments, as described above. The success rate is greater than 90%. This procedure is done in surgery as an outpatient. A small incision is made and closed with sutures. Light duty with the hand is recommended until the sutures are removed in seven to ten days. A gradual return to activity is recommended after that, as tolerated. Returning to heavy lifting, gripping, and pulling may take up to four to six weeks. An Orthopedic surgeon does surgical release.
If you are experiencing a trigger finger, it is best to talk with your primary care provider. They can refer you to an Orthopedic Specialist.
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