Trigger Finger: Causes, Symptoms and How Physiotherapy Can Help

Imagine reaching for your morning teh tarik and your finger gets stuck in a bent position, then snaps straight with a painful pop. This is the hallmark of trigger finger, a common hand condition that affects people across Malaysia – from office workers and cooks to factory assemblers and musicians. While it may seem like a minor annoyance initially, untreated trigger finger can progress to a point where the finger becomes permanently locked.

What Causes a Finger to "Trigger"?

Trigger finger (stenosing tenosynovitis) occurs when the flexor tendon that bends your finger becomes swollen or develops nodules, making it difficult to glide smoothly through the tendon sheath – a tunnel of tissue that holds the tendon close to the bone. The A1 pulley, a ring-like band at the base of the finger, is the most common site of narrowing. When the swollen tendon catches on this pulley, it produces the characteristic clicking, catching, or locking sensation.

The condition most commonly affects the ring finger and thumb, though any finger can be involved. It occurs more frequently in the dominant hand and can affect multiple fingers simultaneously.

Risk Factors and Contributing Causes

Several factors increase the likelihood of developing trigger finger:

• Repetitive gripping – Sustained or repeated forceful gripping during cooking (holding a wok), gardening, or industrial work is a primary trigger. Malaysian hawker centre cooks and factory workers are particularly susceptible
• Diabetes mellitus – People with diabetes are up to 10% more likely to develop trigger finger. Given Malaysia's high diabetes prevalence, this is a significant factor
• Age and gender – Most common between ages 40-60 and occurs more frequently in women
• Rheumatoid arthritis – Inflammatory conditions can cause swelling of the tendon sheaths, narrowing the space available for tendon gliding
• Prolonged gripping of tools – Using hand tools, playing musical instruments, or extended smartphone use can contribute
• Previous hand surgery – Particularly after carpal tunnel release, as changes in hand mechanics can increase tendon strain

Progression of Symptoms

Trigger finger typically progresses through recognisable stages:

• Stage 1 – Pain and tenderness at the base of the finger, with a palpable nodule in the palm. No catching yet
• Stage 2 – Intermittent catching or clicking when bending and straightening the finger, which can be actively overcome
• Stage 3 – The finger locks in a bent position and requires the other hand to straighten it (passive extension)
• Stage 4 – The finger becomes fixed in a bent position and cannot be straightened even with the other hand

Symptoms are typically worse in the morning and may improve with use throughout the day as the tendon warms up and swelling decreases temporarily.

If you recognise these symptoms, it is important to seek professional assessment rather than trying to self-diagnose. Many conditions share similar symptoms, and an accurate diagnosis is crucial for effective treatment.

Struggling with Trigger Finger? A physiotherapist can assess your condition and create a personalised recovery plan. Chat with a physiotherapist near you

Physiotherapy Treatment Approaches

Physiotherapy is effective for mild to moderate trigger finger (stages 1-2) and plays an important supportive role after corticosteroid injection or surgery.

Splinting

A custom or prefabricated splint that holds the finger's metacarpophalangeal (MCP) joint in a slightly extended position can prevent the tendon from catching on the pulley. Worn at night and during aggravating activities, splinting allows the inflamed tendon to rest and recover while you maintain use of the finger for daily tasks.

Therapeutic Exercises

• Tendon gliding exercises – A sequence of hand positions (straight, hook fist, full fist, tabletop, straight fist) that maximise tendon excursion and prevent adhesions within the sheath
• Isolated finger stretches – Gentle passive extension of the affected finger using the opposite hand, holding for 15-30 seconds
• Finger abduction and adduction – Spreading the fingers apart and bringing them together to maintain overall hand dexterity
• Grip strengthening – Once acute inflammation settles, progressive grip exercises using therapy putty or a soft ball to rebuild hand strength

Manual Therapy Techniques

• Soft tissue massage – Deep friction massage over the A1 pulley and along the tendon to reduce adhesions and promote tendon gliding
• Joint mobilisation – Gentle mobilisation of the finger joints to maintain range of motion and prevent stiffness
• Myofascial release – Releasing tension in the forearm flexor muscles that connect to the finger tendons

Other Treatment Options

Your physiotherapist may recommend additional interventions depending on the severity:

• Corticosteroid injection – A steroid injection into the tendon sheath is effective in 60-90% of cases, particularly for early-stage trigger finger. It can be combined with physiotherapy for best results
• Surgical release – For persistent or severe cases (stages 3-4), a minor procedure to release the A1 pulley allows the tendon to glide freely again. Post-surgical physiotherapy focuses on scar management, restoring range of motion, and rebuilding grip strength

Preventing Trigger Finger

• Take regular breaks during repetitive hand activities – every 30 minutes, stretch your fingers fully open and hold for 10 seconds
• Use padded handles on tools and kitchen utensils to reduce the gripping force required
• Alternate tasks that require gripping with lighter activities to give your tendons rest
• If you have diabetes, maintaining good blood sugar control reduces your risk of tendon problems
• Address any early clicking or catching promptly – early treatment is far more effective than waiting for the condition to worsen

Free Your Fingers from Pain

Trigger finger is a treatable condition that responds well to early intervention. Do not wait until your finger becomes locked.

A qualified physiotherapist can assess your specific situation and create a treatment plan designed for your needs. Find a physiotherapist near you and take the first step toward getting back to the activities you love.