What causes upper extremity tenosynovitis?
The exact cause of most upper extremity tenosynovitis remains unknown. The following are possible causes or conditions that may increase your risk of getting upper extremity tenosynovitis: Calcium deposits: Calcium may be deposited in the tendons due to decreased oxygen and poor blood supply. These deposits may cause irritation and swelling of the tendon and its covering.Impingement: Incorrect arm or hand movements, or weak flexor muscles may cause the tendon to become trapped. This may also happen in people who overtrain or have a sudden change in arm or hand activity.Infections: Germs, such as bacteria or fungi, may often cause upper extremity tenosynovitis. The infections may result from wounds, bites, or intravenous (IV) drug abuse.Tendon overuse: Upper extremity tenosynovitis may also be caused by frequent, repeated movements of your upper extremity. Jobs that may cause this condition include piano playing, cutting meat, sewing, or dentistry.Trauma: Skin injuries or a direct blow
