Understanding Trigger Finger
Trigger finger, also known as stenosing tenosynovitis, occurs when a finger tendon becomes irritated or inflamed, causing the finger to catch, lock, or snap when trying to straighten it. This condition can interfere with daily activities and may progress from mild stiffness to painful locking. Repetitive gripping, injury, or underlying conditions such as arthritis or diabetes can increase the risk. With early treatment and activity modification, many people can restore comfortable finger movement and prevent worsening symptoms.
How Trigger Finger Develops
Each finger tendon passes through a protective sheath that allows smooth gliding during movement. When this sheath becomes irritated or inflamed, it narrows and restricts the tendon’s motion. Continued irritation can lead to swelling, scarring, or the formation of small nodules that make tendon movement even more difficult. As a result, the tendon may catch or lock, creating the characteristic trigger-like snap.
Trigger finger is more common in individuals whose work or hobbies involve repetitive gripping or pinching motions. Writing, painting, factory work, and similar tasks can place frequent strain on the tendons. Women and people with diabetes have a higher risk, especially when nerve or circulation issues are already present. Without treatment, the finger may eventually remain stuck in a bent position.
Recognizing the Symptoms
Symptoms of trigger finger typically develop gradually, starting with stiffness or discomfort in the morning. A popping or clicking sensation may occur when bending or straightening the affected finger. Early signs often include mild pain or tenderness at the base of the finger, especially when gripping objects.
As the condition progresses, swelling or a noticeable bump (nodule) may form along the tendon. More advanced symptoms include the finger catching or locking in a bent position before suddenly snapping straight. Severe cases can result in the finger becoming stuck and unable to extend. Multiple fingers or both hands may be affected at the same time.
Treatment and Pain Relief
Early treatment focuses on reducing inflammation and limiting strain on the affected tendon. Non-steroidal anti-inflammatory medications, along with warm compresses or ice, may help relieve discomfort. Night splints can hold the finger in a straight position and prevent locking while the tendon rests. Stretching exercises may also help maintain mobility and ease stiffness.
Advanced Care and Long-Term Options
If symptoms do not improve with conservative care, corticosteroid injections may help reduce inflammation around the tendon sheath. For persistent or severe trigger finger, minimally invasive procedures such as percutaneous release may be performed in the office. This technique uses a needle to break apart constricting tissue, often with ultrasound guidance for precision.
Surgical release is another option when other treatments are unsuccessful. During surgery, the surgeon carefully opens the affected sheath to create more space for the tendon to glide. With the right approach and timely care, most people experience significant symptom relief and a return to comfortable hand function.