Stenosing tenosynovitis is a the thickening of the fibrous ring of the sheath of the flexor digitorum, which occurs due to chronic irritation, and which results in the appearance of a phenomenon known as “snapping finger”. Patients usually complain about difficulties with finger stretching, which is accompanied by a sound phenomenon of clicking. At a later stage, it is possible that the patient cannot stretch his finger at all. It is very successfully treated surgically, under local or regional anesthesia, and involves the relaxation of the tendon sheath. The sutures are removed 12 to 14 days after the intervention.