Overview
Trigger finger is a common hand condition in which a finger or thumb gets stuck, catches, or locks during bending or straightening. It involves the flexor tendon and the tendon sheath pulley system at the base of the finger (often the A1 pulley). When the tendon glides less smoothly-often due to thickening and inflammation-it can move with a painful "click" or become stuck. Over time, stiffness and reduced finger motion can develop, making everyday gripping and opening tasks more difficult.
Symptoms
Patients typically notice pain or tenderness at the palm side near the base of the affected finger, along with a clicking, catching, or locking sensation when they bend or straighten it. Morning stiffness is common, and symptoms may worsen with repetitive gripping, lifting, or extended hand use. Some people feel a firm bump or nodule at the base of the finger. In more persistent cases, the finger may become harder to fully straighten or bend, affecting grip strength and fine hand movements.
Causes
Trigger finger develops when the flexor tendon does not glide smoothly through its sheath and pulley. Most cases involve thickening of the tendon and/or inflammation around the tendon sheath, which narrows the space the tendon needs to move. Repetitive use, metabolic or inflammatory conditions, and local overloading can contribute to this tendon-pulley mismatch.
Risk Factors
Diabetes is one of the best-known risk factors, and trigger finger also occurs more often in people with rheumatoid arthritis and other inflammatory conditions. Repetitive hand activity and occupations that involve frequent gripping or forceful hand use can increase risk. Age-related tendon changes and conditions such as thyroid disease can also make trigger finger more likely, and it may occur during or after periods of hormonal change.
Prevention
You can lower your risk by reducing repetitive gripping and taking regular breaks during tasks that require sustained hand force. Using ergonomic tools, varying hand positions, and avoiding prolonged "tight grip" can reduce tendon overload. Early attention to hand pain, gentle range-of-motion work, and consistent management of underlying conditions such as diabetes or inflammatory arthritis can help prevent flare-ups.
How the Diagnosis Is Evaluated
A clinician usually starts with a detailed history of clicking, catching, locking, and when symptoms are worst. The physical exam typically includes feeling for a tender nodule and checking for active triggering during finger motion, along with assessing range of motion and grip function. Imaging is often not required, but ultrasound may be used in select cases, and other tests may be considered if an inflammatory condition or alternative diagnosis is suspected.
Nonsurgical Treatment Options
Treatment aims to calm inflammation, improve tendon glide, and restore motion without surgery. Many patients start with activity modification, temporary splinting (often to limit triggering), and over-the-counter or prescribed anti-inflammatory medication if appropriate. Hand therapy may help with range-of-motion strategies and technique changes to reduce tendon irritation. If symptoms persist, a corticosteroid injection into the tendon sheath is a common next step and often provides significant relief. In some settings, platelet-rich plasma (PRP) injections may be discussed as an option when conservative care is not enough, but results can vary and the evidence is mixed.
When to Seek Medical Attention
You should seek medical evaluation if triggering is painful, worsening, or causing progressive difficulty bending or straightening the finger. Get prompt care if the finger becomes suddenly and severely locked, if you develop rapidly increasing swelling or redness, or if you have fever or feel generally ill. Seek urgent attention after trauma when there is concern for tendon injury, fracture, or a sudden loss of function. Also contact a clinician if you notice new numbness, significant weakness, or spreading symptoms in the hand.
Frequently Asked Questions
Mild trigger finger symptoms sometimes improve with rest, reduced gripping, and short-term splinting, but persistent locking often needs targeted treatment.
Some people notice improvement within days to a couple of weeks, while others take longer, depending on how long the tendon has been irritated and how severe the triggering is.
Next Steps
If you have painful catching or locking that keeps returning, start by reducing repetitive gripping and consider a clinician visit for an exam and treatment plan. If symptoms persist beyond a few weeks or your finger begins to lock more often, get evaluated so you can discuss options like splinting, therapy, and injections when appropriate.