Trigger Finger / Trigger Thumb

Trigger finger or trigger thumb causes clicking, locking, or catching when bending or straightening the affected finger or thumb. Some people notice pain at the base of the digit, and in more severe cases the finger may temporarily lock in a bent position before releasing. This can make everyday tasks such as gripping, writing, or using a phone uncomfortable and frustrating.

Understanding Trigger Finger and Trigger Thumb

This condition occurs when the flexor tendon thickens or the surrounding pulley (the A1 pulley) becomes inflamed, preventing smooth tendon movement. Over time, this can lead to pain, catching, and difficulty using the finger or thumb normally.

Assessment at The London Ultrasound Clinic

Your appointment includes a hands-on assessment of finger movement and a high-resolution ultrasound scan. This allows us to examine the flexor tendon and A1 pulley, confirming where thickening or inflammation is causing the tendon to catch as it moves.

Conservative Management

In milder cases, symptoms may improve with simple measures, which are usually the first step in treatment:

• Activity modification and rest to reduce strain on the tendon
• Guided exercises to improve tendon gliding and finger movement
• Education and reassurance about the condition and expected recovery

These approaches often reduce symptoms and may prevent the need for injections.