RSI guide · Fingers & thumb

Trigger Finger

Trigger finger makes a finger or thumb catch, click or lock when you bend it. Repetitive gripping and clicking can aggravate it — here’s how to reduce strain at your computer.

By the No More Pain Ergonomics team · Australian ergonomic specialists since 2013 · Updated November 2026

Quick answer

Trigger finger (stenosing tenosynovitis) happens when a finger or thumb tendon becomes irritated and can no longer glide smoothly through its sheath, so the finger catches or locks. Reduce repeated and forceful finger use at the computer with a mouse that needs a light grip and light clicks, programmable buttons or shortcuts, a light typing touch and regular breaks.

In this guide

What is trigger finger?

The tendons that bend your fingers slide through tunnels called sheaths. If a tendon becomes inflamed and thickened, it can catch on the sheath opening. Bending the finger then pulls the tendon through with a click or snap, and the finger may lock in a bent position.

Symptoms

Locking

A finger or thumb that gets stuck in a bent position.

Clicking or popping

A click when you bend or straighten the finger.

Tender lump

Pain or a small lump at the base of the finger on the palm side.

Morning stiffness

Symptoms often worse first thing in the morning.

Reducing finger strain at the computer

  1. Use less force. Choose a mouse with light-touch buttons and type with a light touch.
  2. Avoid a tight grip. A mouse that fits your hand lets your fingers rest rather than clench.
  3. Share the load. Use different fingers to click, or a roller mouse you can operate with any finger.
  4. Cut repetitions. Use keyboard shortcuts, programmable buttons and scroll features to reduce clicks.
  5. Take breaks and gently open and close your hands.

Recommended equipment

ErgoSlider Plus+ Mouse
ErgoSlider Plus+ MouseClick with any part of your hand.Best for: Left and right-handed users wanting minimal reachView product
Evoluent Vertical Mouse - D Series
Evoluent Vertical Mouse - D SeriesLow-force clicking and programmable buttons.Best for: Right-handed users, small to large handsView product
Ease Vertical Ergonomic Mouse
Ease Vertical Ergonomic MouseRelaxed handshake grip.Best for: Medium-hand users seeking ergonomic pain reliefView product
XM Precision Mouse
XM Precision MouseDual scroll controls to reduce dragging.Best for: Creative professionals and power users who need precision control across multiple devices.View product

Shop ergonomic mice

Treatment

Treatment may include rest, splinting, exercises, injections or a minor procedure. See your GP or Hand Therapist for assessment.

Frequently asked questions

Can using a computer mouse cause trigger finger?

Repetitive and forceful finger movements, such as clicking and gripping a mouse for long periods, can aggravate the finger tendons and contribute to trigger finger.

What mouse is best for trigger finger?

Look for light-touch buttons and a shape that doesn’t require a tight grip. A roller mouse lets you click with any finger, sharing the load across the hand.

Related guides

This guide provides general ergonomic information only and is not a substitute for medical advice, diagnosis or treatment. If you have ongoing or worsening symptoms, see your GP or a health professional such as a Physiotherapist, Hand Therapist or Occupational Therapist.

No More Pain Ergonomics · nomorepainergonomics.com.au/pages/trigger-finger · 1300 898 965 · info@nomorepainergonomics.com.au · Updated November 2026

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