Tendon sheath inflammation is caused by chronic strain and repeated activity, leading to a sterile inflammation of the tendon sheath surrounding the tendon. This results in impairment of tendon movement, causing symptoms such as pain and restricted movement. Tendon sheath inflammation primarily arises from repetitive activity and chronic strain. It can be relieved by appropriate resting, topical non-steroidal anti-inflammatory drugs, and physical therapy. In severe cases where tendon impingement occurs, surgery is required to alleviate the symptoms. Massage therapy is not recommended for this type of sterile inflammation, as it does not have a significant effect.