Tenosynovitis is a disease in which the tendon sheath tissue becomes inflamed and fibrous due to frequent activity or excessive force or chronic cold stimulation in a short period of time, causing the tendon sheath to thicken, resulting in narrowing of the sheath canal and restricting the movement of the tendon within the sheath canal, and the inflammatory reaction causes local pain. Many patients who are diagnosed with tenosynovitis show great disbelief, thinking that they have not done anything to harm their health, how can they suffer from this disease? In fact, the occurrence of tenosynovitis is closely related to our lives. Common causes: 1. Acute trauma: When the body is subjected to acute trauma it is easy for the trauma to cause inflammation of the tendon sheath, resulting in the tendon sheath not being able to slide normally and forming tendon sheathitis. For example, the hand is sprained, the wrist is fallen, etc. 2, excessive activity: more and more people go to work with their fingers constantly tapping the keyboard to do repeated mechanical movements, long-term maintenance in a state, or laundry, cooking, knitting sweaters, cleaning and other household chores, tendon sheath tissue transition friction, so that the tendon sheath tissue swelling, hyperplasia, resulting in inflammatory reactions. 3, frostbite: If it is in the cold season, due to cold invasion, frostbite joints. Especially the finger parts of the cold, frostbite, it is easy to form tendinitis, and sometimes the root of the disease, so we must pay attention to the warm. 4, infection: if they suffer from diabetes, rheumatoid arthritis and infectious diseases, it is likely that the inflammation of these diseases will induce tendon sheath infection inflammation, the formation of tenosynovitis. The main prevention of tenosynovitis should be to change the various bad habits and activities that induce the disease, avoid repeated friction activities, reduce local stimulation, etc. 2, continuous work time should not be too long, after work, to rub rub fingers and wrists, and then hot water bubble hands. 3, in the cold season, pay attention to the cold to keep warm, to avoid cold or frostbite. 4.Actively prevent and treat diabetes, rheumatoid arthritis and other infectious diseases.