Otherwise known as steonosing tenosynovitis is caused by the tendons that bend the finger catching within an interal tunnel at the base of the finger which may be due to rheumatoid arthritis, gout or diabetes. Symptoms include discomfort at the base of the finger or thumb and swelling in this area making it difficult or painful to straighten the digit from the flexed position. Treatment may include a steroid injection or changing activity in order to reduce swelling. Surgery to allow the tendon to glide more freely may be recommended if conservative treatment does not improve symptoms. Patients may feel tenderness, discomfort and swelling after the procedure and occasionally hand therapy is recommended.