Many patients feel soreness at the base of the thumb. The most common symptom is a (more or less) painful clicking or snapping when the affected thumb is extended from a flexed position.


captureThe symptoms are usually more pronounce in the morning an during late night.

The narrowing of the tendon sheet refers to mechanical impingement of flexor tendon of the thumb at the level of the A1-pulley. In medicine it is called: „stenosing tendosynvoitis“

More often than is observed on the finger the thumb locks at the end joint in an extended or flexed position.


  • Splinting the affected finger in an extended position for up to six weeks. The splint helps to rest the joint. Splinting also helps prevent you from curling your fingers into a fist while sleeping, which can make it painful to move your fingers in the morning.
  • Finger exercises: This can help you to maintain mobility in your finger.
  • Avoiding repetitive gripping: For at least three to four weeks, avoid activities that require repetitive gripping, repeated grasping or the prolonged use of vibrating machinery.
  • Soaking in warm water: Placing your affected hand in warm water, especially in the morning, may reduce the severity of the catching sensation during the day. If this helps, you can repeat the soaking several times throughout the day.
  • Massage:  Massaging your affected fingers may feel good and help relieve your pain, but it won’t affect the inflammation.
  • The locked finger: This procedure is most effective for the index, middle and ring fingers.
  • Surgery: Though less common than other treatments, surgical release of the tendon may be necessary for troublesome locking that doesn’t respond to other treatments.