Trigger finger

Also called Stenosing tenosynovitis or Trigger thumb

Trigger finger is a condition where a finger or thumb gets stuck when bent and then suddenly straightens with a click or snap. It happens when the tendon that bends the finger becomes irritated and cannot slide smoothly. It is more common in women, people over 40, and people with diabetes or rheumatoid arthritis.

Last updated Nov 9, 2026

What it is

It sometimes gets better by itself. Resting the hand, a splint and painkillers can help.

A steroid injection often works well. If it keeps coming back, a small operation can release the tendon.

Common signs

  • A finger or thumb getting stuck when bent
  • A click or snap when straightening it
  • Pain or a lump at the base of the finger or thumb
  • Stiffness, often worse in the morning

How it is usually diagnosed

  • Examination of the hand

Records worth keeping

Keeping these together makes each appointment easier, especially when you see a new doctor:

  • GP or hand clinic notes
  • Injection records
  • Surgery notes

Questions to ask your doctor

  • Would a splint or injection help?
  • How long until it gets better?
  • When would surgery be considered?

When to get help right away

Call 112 or go to the nearest emergency department if you have:

  • A hot, red, swollen finger with a fever, or after a puncture wound: get urgent help the same day

This page is general information. It is not a diagnosis and does not replace a doctor who knows your history. Medfold keeps your records organised; it does not interpret them.

Sources