Trigger Finger / Trigger Thumb / Trigger Digit
About Trigger Finger / Trigger Thumb / Trigger Digit
Trigger finger is a condition that affects the flexor tendons in your fingers or thumb and limits finger movement. When you bend or straighten your finger, the flexor tendon slides through a snug tunnel, called the tendon sheath that keeps the tendon in place next to the bones. Trigger finger occurs when the flexor tendon becomes irritated. As it becomes more and more irritated, the tendon may thicken and nodules may form, making its passage through the tunnel more difficult. As a result, the tendon becomes momentarily stuck at the mouth of the tendon sheath tunnel when you try to straighten your finger. You might feel a pop as the tendon slips through the tight area and your finger will suddenly shoot straight out.
The cause of trigger finger is usually unknown. Factors that put people at greater risk for developing it include trauma or activities that strain the hand as well as certain medical problems, such as diabetes and rheumatoid arthritis. Nonsurgical treatment options include rest, over-the-counter pain medications, and steroid injections. If nonsurgical options fail or the finger is stuck in a bent position, surgery may be recommended.