What is trigger finger?

The tendons that bend your fingers run through a series of small tunnels called tendon sheaths. In trigger finger, the tendon can become thickened or irritated and does not glide smoothly through its sheath.

This can cause the tendon to catch as the finger moves, producing the characteristic clicking or locking sensation.

The same condition affecting the thumb is known as trigger thumb.
What are the symptoms?

Common symptoms include:​

• Pain or tenderness at the base of the finger or thumb

• Clicking or catching when bending or straightening the finger

• Stiffness, particularly first thing in the morning

• A finger that temporarily locks in a bent position

• Needing to use your other hand to straighten the affected finger

• A tender lump or thickening around the base of the finger

Symptoms can vary considerably. Some people mainly experience pain, while others notice significant catching or locking.

What causes trigger finger?

Trigger finger often develops without an obvious cause. It is more common in people with certain conditions, including diabetes and rheumatoid arthritis.

Repetitive hand use may aggravate symptoms, although this does not necessarily mean that it caused the condition.

 

Treatment

Can a steroid injection help trigger finger?
A corticosteroid injection is a commonly used treatment for trigger finger and trigger thumb.

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The aim of the injection is to reduce inflammation and swelling around the tendon, allowing it to glide more freely through the tendon sheath.

Some people notice an improvement within a few days, while for others it may take several weeks.

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An injection does not work for everyone and trigger finger can recur. If symptoms persist despite appropriate non-surgical treatment, surgical release may sometimes be considered.

 

Medical Resource: 

For further clinical guidelines on Trigger Finger, view the official NHS Trigger Finger Resource