Trigger finger is a condition where a finger gets stuck in a bent position and may suddenly straighten with a snap. Commonly affecting the ring finger and thumb, this condition occurs when the tendon controlling the finger cannot glide smoothly within its surrounding sheath.
This condition can be painful, causing fingers or the thumb to catch or lock when bent. It can impact any finger or even multiple fingers. Rheumatoid arthritis (RA) can influence this condition, as it affects joints throughout the body, including those in the hands and fingers. Symptoms of RA in the hands include pain, swelling, and stiffness, particularly in the wrist and finger knuckles.
The causes of trigger finger are varied. While it is more common in individuals with certain medical conditions like rheumatoid arthritis, gout, and diabetes, repeated and strong gripping may also lead to its development. However, in many cases, the exact cause remains unknown.
Symptoms of trigger finger include a snapping or popping sensation during finger movement, pain, and stiffness when flexing the fingers or thumb towards the palm. People over the age of 45, those with diabetes or rheumatoid arthritis, are more likely to experience trigger finger. It is rare in children and usually occurs when the tendon sheath becomes irritated.
For a detailed understanding of trigger finger, its symptoms, causes, and treatments, visit the Mayo Clinic, WebMD, and Cleveland Clinic for more information.
