The main cause of trigger finger is swelling and inflammation around the tendon. Without treatment, the finger may become locked in the bent position. People who have hobbies or jobs that require repetitive gripping or squeezing are more likely to develop trigger finger, as are people with diabetes.

Repeated movement or forceful use of your finger or thumb can lead to inflammation of a tendon, which can cause trigger finger. You also might get trigger finger from something called contact friction, the result of holding something that vibrates.

Trigger finger can sometimes go away on its own. Many people can manage their symptoms by taking anti-inflammatory medication like ibuprofen or naproxen. Rest, wearing a splint at night or occupational therapy might be recommended for cases that don't respond to over-the-counter medication.