Trigger Finger: Why Your Finger Locks, Treatments That Help & When to Worry

Have you ever woken up with a finger that feels stiff, clicks when you bend it, or gets stuck in your palm when you try to straighten it? You may notice a painful snap when the finger finally releases. Sometimes, you need your other hand to gently straighten it.

These symptoms may be caused by trigger finger, a condition that affects the tendons responsible for bending your fingers and thumb.

The good news is that trigger finger does not always require surgery. Depending on how severe the symptoms are, treatment may include activity modifications, an appropriate finger splint, medical treatment such as a corticosteroid injection, or surgery in persistent cases. An early assessment can help you understand your options and avoid delaying appropriate care.

At Port Credit Physio & Rehab in Mississauga, our Registered Physiotherapists can assess your hand symptoms, explain appropriate conservative management options and help you determine whether you may benefit from physiotherapy or a referral to another healthcare professional.

What Is Trigger Finger?

Trigger finger, also called stenosing tenosynovitis, is a condition in which a finger or thumb tendon has difficulty gliding smoothly through the surrounding tissue at the base of the digit.

When you bend or straighten your finger, the tendon normally slides through a narrow tunnel. If the tendon or the surrounding pulley tissue becomes thickened, the tendon may catch as it moves through this space. This can cause:

• Clicking or popping when bending or straightening a finger
• Pain or tenderness at the base of the finger, near the palm
• Stiffness that is often worse in the morning
• A finger that catches or locks in a bent position
• Difficulty straightening the finger without using your other hand

Trigger finger most commonly affects the ring finger and thumb, although any finger can be involved.

Can Trigger Finger Go Away on Its Own?

Some mild cases improve with time and changes to aggravating activities. Others persist or worsen and may require a splint, a corticosteroid injection or surgery. The most appropriate option depends on the severity and duration of your symptoms.

Why Does My Finger Lock When I Bend It?

A finger that locks or clicks does not automatically mean you have trigger finger, but it is a common symptom.

Each finger has tendons that help it bend. Near the base of the finger, a structure called the A1 pulley helps hold the flexor tendon close to the bone. When the tendon or pulley becomes thickened, the tendon may struggle to pass smoothly through the tunnel. It can catch during movement and then suddenly release, creating the clicking or snapping sensation.

This is why you might notice that:

• Your finger clicks when making a fist
• Your finger feels stiff after sleeping
• You have to straighten your finger slowly
• The base of your finger hurts when gripping a steering wheel, a mug or a tool
• Your finger sometimes stays bent until you use your other hand to straighten it

What Causes Trigger Finger?

Trigger finger can develop without one obvious cause. Several factors may contribute to the condition or increase the likelihood of developing it.

1. Repetitive Gripping

Activities involving frequent or forceful gripping may aggravate symptoms. Examples include using tools, gardening, carrying heavy bags and repetitive hand tasks. However, trigger finger is not always caused by overuse, and having a physically demanding job does not mean you will develop it.

2. Diabetes

Trigger finger occurs more frequently in people with diabetes. It may also be more persistent or affect multiple fingers.

3. Rheumatoid Arthritis and Other Health Factors

Inflammatory conditions may be associated with tendon problems. Your healthcare provider can help determine whether an underlying condition is contributing to your symptoms.

4. Age and Sex

Trigger finger is more common in adults over 40 and occurs more frequently in women.

5. Previous Hand Problems

A history of hand conditions or tendon irritation may be relevant when your healthcare provider assesses your symptoms. Understanding your risk factors helps guide assessment, but your symptoms and examination are important for determining the next steps.

What Are the Stages of Trigger Finger?

Trigger finger symptoms can range from mild tenderness to a finger that remains locked.

This is a practical description of symptom severity, not a formal diagnostic grading system. Symptoms do not always progress through these stages in order.

Why Does Early Assessment Matter?

Identifying the problem early can help you understand whether conservative management is reasonable or whether medical treatment should be considered sooner.

How Is Trigger Finger Treated?

Treatment depends on how frequently your finger locks, how much pain you experience, how long symptoms have been present and whether you have other health conditions. There is no single treatment that works for everyone.

1. Activity Modification

Reducing activities that repeatedly aggravate your symptoms may help. You can try:

• Taking breaks during repetitive hand tasks
• Using padded or larger handles where practical
• Avoiding forceful gripping when it increases pain
• Alternating tasks to reduce prolonged gripping

The goal is not to stop using your hand completely. It is to avoid repeatedly provoking symptoms while maintaining comfortable everyday movement.

2. Trigger Finger Splinting

A finger splint can limit movement at a specific joint and may help reduce tendon catching, particularly in early cases. The type of splint, the joint it supports and how long you wear it depend on your symptoms. Some splints are used at night, while other approaches involve more prolonged wear.

A Registered Physiotherapist or another appropriately trained healthcare professional can help assess whether splinting is suitable and whether a custom or ready-made option may be appropriate.

3. Can Physiotherapy Help Trigger Finger?

Physiotherapy may be useful for assessing your symptoms, providing education and helping you identify appropriate conservative management options. Depending on the findings, your physiotherapist may help with:

• Assessing finger movement, tenderness and functional limitations
• Reviewing activities that aggravate your symptoms
• Advising on appropriate splinting options or referral for a custom splint
• Providing guidance on comfortable movement and activity modification
• Monitoring your symptoms and recommending medical assessment when needed

It is important to understand that physiotherapy exercises are not a guaranteed treatment for trigger finger. Repeatedly exercising a finger that catches or locks may aggravate symptoms, and evidence supporting active hand therapy alone is limited. Your treatment should be based on an individual assessment rather than a standard set of exercises for everyone.

4. Does Shockwave Therapy Help Trigger Finger?

Shockwave therapy has been investigated for trigger finger, but the evidence is limited and it should not be presented as a proven first-line treatment.

At Port Credit Physio & Rehab, treatment recommendations are based on the clinical assessment, available evidence and your individual needs. Do not delay appropriate medical care to try a treatment with uncertain benefits.

5. Cortisone Injection for Trigger Finger

A corticosteroid injection, sometimes called a cortisone injection, is a common medical treatment for trigger finger. The medication is injected around the affected tendon sheath to reduce inflammation and symptoms. Some people experience substantial relief after one injection, while others have persistent symptoms or recurrence.

Improvement may begin within days, although it can take longer. Results vary, and an injection does not guarantee permanent resolution.

Potential side effects and considerations include temporary soreness, skin changes, infection risk and a temporary rise in blood glucose in people with diabetes. Your doctor or other qualified injection provider can discuss the risks, expected benefits and whether an injection is suitable for you.

6. Trigger Finger Release Surgery

If symptoms remain troublesome despite appropriate nonsurgical treatment, or if the finger is severely locked, a doctor may recommend a surgical procedure called trigger finger release.

The procedure releases the constricted pulley so that the tendon can glide more freely. Recovery and rehabilitation depend on the procedure, wound healing, finger stiffness and your surgeon's instructions. Physiotherapy may be recommended after surgery when movement, stiffness or function requires further rehabilitation. Learn more about post-surgical hand rehab and physiotherapy before and after surgery.

When Should You Worry About Trigger Finger?

Most cases are not emergencies, but certain symptoms need prompt medical attention.

Arrange a medical assessment if:

• Your finger is locked and will not straighten
• Your symptoms are worsening or interfering with everyday activities
• The finger repeatedly locks or you need your other hand to straighten it
• You have numbness, tingling or a change in finger colour
• Symptoms are not improving with appropriate conservative management

Numbness is not a typical defining symptom of trigger finger, so it may indicate another problem, such as carpal tunnel syndrome, that needs assessment.

How Can a Physiotherapist Assess Your Finger?

An assessment begins with understanding what you are experiencing and how it affects your daily activities. Your physiotherapist may ask:

• Which finger is affected?
• When did the clicking or locking begin?
• Is the finger worse in the morning?
• Does it straighten on its own, or do you need your other hand?
• Is there pain or a lump at the base of the finger?
• Do you have diabetes, arthritis or a history of hand problems?
• Which activities have become difficult?

The physical examination may include observing finger movement, checking comfortable range of motion, assessing tenderness and reviewing functional limitations. If the findings suggest that you need medical investigation or treatment beyond physiotherapy, your physiotherapist can recommend an appropriate referral.

Trigger Finger Physiotherapy in Mississauga

If you are experiencing finger clicking, morning stiffness or repeated locking, you do not have to guess what treatment you need.

At Port Credit Physio & Rehab, located in Port Credit, Mississauga, our Registered Physiotherapists provide individualized assessments to help you understand your symptoms and available management options. We can help you determine whether conservative physiotherapy management may be appropriate, discuss activity modifications and splinting considerations, and identify when medical treatment or referral is needed.

You can learn more about our hand and wrist physiotherapy services in Mississauga and our post-surgical rehabilitation services.

Book a Hand and Wrist Physiotherapy Assessment

If your finger is clicking, catching or becoming difficult to straighten, an assessment can help you understand what may be causing the problem and what steps to take next.

This article is for educational purposes only and does not replace an individual assessment or medical advice.