Tendon sheath inflammation refers to the sterile inflammation of the tendon sheath surrounding a tendon, caused by repetitive activity and friction. This condition can impact tendon movement. In cases of early symptoms, conservative treatment such as rest and the topical application of non-steroidal anti-inflammatory drugs can be used to alleviate symptoms. However, if the symptoms are severe and lead to constrictive tendonitis, where the movement of the tendon sheath is obstructed and there is a snapping sensation during movement, surgery may be necessary to remove the constricted tendon sheath and relieve symptoms.