Trigger Finger: Why Your Finger Catches, and What to Try Before an Injection

A finger that catches, clicks, or locks when you bend it is unsettling, and it has a name: trigger finger. The good news is that, especially when caught early, it often responds to simple measures before any injection or surgery enters the picture. Here is what is happening and what to try first.

Why the finger catches

To bend a finger, a flexor tendon glides through a series of snug tunnels, called pulleys, along the finger. In trigger finger, the tendon and the tunnel it passes through, usually the one at the base of the finger, become irritated and thickened. The tendon then catches as it tries to glide through the narrowed space, like a rope dragging through a ring that has become too tight.

That catching produces the hallmark symptoms: clicking, catching, or locking when you bend and straighten the finger, sometimes with a tender bump at the base of the finger in the palm. In more advanced cases the finger can lock in a bent position and need to be straightened with the other hand. It is part of the family of trigger finger and related hand tendon problems we treat, which also includes conditions like de Quervain's tenosynovitis.

Who tends to get it

Trigger finger is often linked to repetitive or forceful gripping, which keeps the tendon and tunnel irritated. It is also more common in certain age groups and notably more common in people with diabetes. That diabetes link is worth knowing, because someone with several fingers triggering may benefit from a conversation with their physician about their overall health, not just the finger itself.

The first-line approach: splinting and load changes

When trigger finger is caught early or is mild, conservative measures often settle it without an injection.

Splinting. A splint that holds the affected finger straight, particularly worn at night, reduces the repetitive catching and gives the irritated tendon a chance to calm down. It works best in milder cases and when combined with activity changes. By stopping the finger from cycling through the painful catch over and over, the splint lets the tissue settle.

Activity modification. Reducing the heavy, repetitive gripping that aggravates the tendon is the other half of the early plan. Just as with other hand tendon problems, removing the load that drove the irritation is essential, because a tendon that keeps getting overloaded cannot settle no matter what else you do.

A hand therapist can also guide gentle tendon-gliding movements and advise on how to modify the gripping tasks that flare it, so the finger keeps moving without constantly re-triggering.

When an injection is the next step

If splinting and activity changes do not settle the symptoms, a corticosteroid injection into the tendon sheath is commonly the next step, and it is often effective, sometimes resolving the problem entirely. It is a reasonable measure to try before surgery.

The decision is made with your physician, who weighs how severe and persistent the triggering is and your overall health, including conditions like diabetes that can affect how injections are managed. Unlike some tendon problems where injections offer only short-term relief, corticosteroid injection has a genuinely useful role in trigger finger specifically, which is why it sits as a standard step between conservative care and surgery.

When surgery is needed

Surgery is considered when the finger is locking severely, when symptoms persist despite splinting and one or more injections, or when the catching significantly affects hand function. The procedure releases the tight tunnel so the tendon can glide freely again, and it is generally effective.

Most cases do not reach this stage. The point of starting with splinting and activity changes, then injection if needed, is that the majority of trigger fingers settle without an operation. Surgery is the answer for the stubborn minority, not the default.

When to get it assessed

If a finger is catching, clicking, or locking, an assessment confirms it is trigger finger, fits you with an appropriate splint, and gives you practical ways to reduce the aggravating gripping. Caught early, it often responds to these simple measures. If you have several fingers triggering, mention it to your physician, as it can relate to your broader health.

Book a 30-minute appointment and we will assess the finger, set up the right splinting and activity plan, and coordinate with your physician if an injection or surgical opinion becomes the right next step.

This article is general information about trigger finger. It is not personal medical advice. Injection and surgical decisions belong with a physician. A regulated practitioner can confirm whether the patterns described apply to you.

Sources

• Fleisch et al. Corticosteroid injections in the treatment of trigger finger: a level I and II systematic review, Journal of the American Academy of Orthopaedic Surgeons (2007)
• Valdes. A retrospective review to determine the long-term efficacy of orthotic devices for trigger finger, Journal of Hand Therapy (2012)
• College of Physical Therapists of BC (CPTBC)

This article is for general information only and does not constitute medical advice, diagnosis, or treatment. Individual presentations vary, and assessment findings and treatment plans differ from person to person. If you are experiencing severe symptoms, neurological changes (numbness, weakness, bowel or bladder changes), or a significant trauma, contact your physician or emergency services. Care at Medstar Sport Physio & Health is provided by practitioners registered with their respective British Columbia regulatory colleges.