Trigger Finger or Thumb

What is a Trigger Finger/Thumb?

Formally known as stenosing tenosynovitis, if you find a finger a thumb stuck in a bent position, this is termed as a trigger finger or thumb. Trigger finger is commonly caused by repetitive or forceful use of the fingers or thumb and can be related to your occupation where gripping or grasping is necessary.

A trigger finger can be painful and is caused by the narrowing of the sheath that surrounds the affected finger’s tendon.

Trigger finger is associated with medical conditions such as diabetes, gout, and osteoarthritis, and is more common in women than men. The thumb or middle or ring finger is usually affected and more than one finger can be affected at the same time.

What are the symptoms of a Trigger Finger/Thumb?

• Finger or thumb locked in a bent position
• Stiffness
• Sensation of clicking or popping when the finger is used
• Tenderness and pain 
• A nodule or bump where the base of the finger lies in the palm
• Locking in a bent position, often suddenly popping straight

How is a Trigger Finger/Thumb diagnosed?

Checking of medical history and physical examination by a doctor without the need for special testing.

Reviewed by Dr. Chew Yoon Chong Winston, Consultant, Hand and Orthopedic Surgeon, BJIOS Orthopaedics