Trigger Finger Treatment: Causes, Symptoms, and When Surgery Is Needed
1. What Trigger Finger Is
Trigger finger (stenosing tenosynovitis) occurs when a finger or thumb becomes difficult to straighten because the tendon that helps the finger bend cannot glide smoothly through its protective sheath.
In simple terms, the tendon catches or gets stuck, causing the finger to “click” or “lock” when you try to move it.
Who Is at Higher Risk?
Trigger finger is more common in:
- People who frequently grip tools, handles, or heavy objects
- Individuals with medical conditions such as diabetes or rheumatoid arthritis
- Anyone performing tasks involving repetitive hand movement
- Women (slightly higher risk compared to men)
- People aged 40+
2. Why It Happens (Causes)
Trigger finger develops when the tendon sheath becomes irritated or thickened. This makes it harder for the tendon to move freely.
Tendon Sheath Thickening
The sheath surrounding the tendon can swell or tighten, reducing the space needed for smooth movement.
Repetitive Use
Activities involving repeated gripping or forceful hand movements—such as typing, gardening, weightlifting, or using tools—can contribute to inflammation.
Diabetes and Arthritis Risk Factors
Medical conditions such as:
- Diabetes
- Rheumatoid arthritis
- Gout
can increase the likelihood of developing trigger finger due to higher levels of tendon inflammation or stiffness.
3. Common Symptoms
Trigger finger symptoms can appear gradually or suddenly. They often affect the thumb, ring finger, or middle finger, but any finger can be involved.
Typical Symptoms
- Clicking or popping sensation when bending or straightening the finger
- Locking, where the finger gets stuck in a bent position
- Morning stiffness, especially on waking
- Pain with gripping, holding objects, or applying pressure
- A tender lump or nodule at the base of the finger
Symptoms may be worse first thing in the morning or after periods of inactivity.
4. Non-Surgical Treatments
Many patients improve with non-surgical options, especially in the early stages.
Splints
A splint can keep the finger straight and reduce strain on the tendon, allowing inflammation to settle.
Steroid Injections
A corticosteroid injection into the tendon sheath may reduce swelling and improve movement. Some people require more than one injection for the best effect.
Rest & Activity Modification
Avoiding activities that trigger repeated gripping or pressure can help prevent symptoms from worsening. Gentle stretching may also be recommended.
Your clinician will discuss which option is most suitable for your symptoms.
5. When Surgery Is Recommended
Surgery may be advised when:
- The finger locks repeatedly or becomes difficult to straighten
- Multiple fingers are affected
- Symptoms do not improve after splints or steroid injections
- Daily activities are affected by pain or limited movement
Surgery aims to restore smooth tendon movement and prevent further locking.
6. What Surgery Involves
Trigger finger release surgery is a quick and straightforward procedure carried out under local anaesthetic.
Procedure Overview
- Your hand is numbed so you do not feel pain
- The surgeon makes a small incision in the palm
- The tight part of the tendon sheath is released
- This allows the tendon to glide freely again
Time & Recovery
- The procedure takes around 10 minutes
- You can move your finger immediately after surgery
- Light activities can resume soon after
- Most people return to normal function over the following days and weeks
Your clinician will explain the aftercare so you know how to protect the area while it heals.
Top 5 FAQs
1. What causes trigger finger?
Trigger finger occurs when the tendon becomes irritated and cannot glide smoothly through its sheath. This may be due to repetitive use, thickening of the sheath, or underlying conditions such as diabetes or arthritis.
2. Is trigger finger always painful?
Not always. Some people experience mild clicking without pain, while others feel discomfort, tenderness, or sharp pain when gripping objects or straightening the finger.
3. Do steroid injections work?
Steroid injections can be effective for many patients by reducing inflammation in the tendon sheath. Some people need more than one injection, and others may still require surgery if symptoms persist.
4. When is surgery necessary?
Surgery is usually recommended when the finger locks frequently, several fingers are affected, or symptoms continue despite splinting or injections.
5. How long is recovery after surgery?
Most people can move the finger straight away and return to light activities shortly after. Full comfort and strength typically improve over several days to weeks, depending on individual healing.