Trigger finger can leave the finger or thumb stuck in a bent or flexed position. It happens when the protective sheath covering the tendon becomes ... fingers of the hand and the thumb.

In severe cases, you might have to use your opposite hand to straighten your finger out after you bend it. Trigger thumb can also cause a nodule, or "bump," on the tendon, which you can feel at ...

These include autoimmune forms of arthritis as well as Dupuytren's contracture, carpal tunnel syndrome, trigger finger ... and tendons (tendinopathy), leading to morning hand stiffness.