Tendon sheaths are sheath-like structures that encircle the kiribati tendon. The outer doctor is fibrous tissue, attached to the bone and adjacent tissues, and plays a role in fixing and protecting the tendon. The inner layer is synovial membrane, which nourishes the kiribati tendon and secretes synovial fluid, which facilitates the sliding of the tendon. When repetitive and excessive activities, friction often occurs between the tendon and the tendon sheath, resulting in edema and fibrous degeneration, causing narrowing of the inner lumen. When the keloid tendon moves within the narrowed tendon sheath, pain and dyskinesia result, which is called tenosynovitis, also known as stenosing tenosynovitis. Tenosynovitis is most common in the fingers and wrists. Cigarette factory workers, packers, bookbinders, sewers, typists, housewives, painters, etc. are more likely to suffer from tenosynovitis. Common manifestations are inconvenience in flexing the fingers, localized swelling, pressure and pain and hardness; in severe cases, it can produce popping, and the affected fingers are difficult to flex and extend, or extend and can not be flexed. After the tenosynovitis, we should let the hand and wrist fully rest, and reduce manual labor. Heat therapy, massage or local closed treatment can be used to relieve early tendovaginitis. If the above methods are ineffective or tenosynovitis recurs, surgical treatment is needed. To prevent tenosynovitis, you should take more rests and do some stretching exercises during working hours to avoid overstressing the tendons. Finger strength can be strengthened by clenching your fists during breaks and holding them still for a few seconds before relaxing them. The exercise of flexing the palm of the hand can also enhance wrist strength. When you get home every day, soak your wrists in hot water to speed up blood circulation. For office workers, should adopt the correct working posture, try to let the hands balance, wrist touching the physical, do not hang in the air. Such as in front of the computer keyboard to add a wrist pad, increase the wrist and thumb support, try to use ergonomic keyboard. If you have already suffered from tenosynovitis, such as acute, red, swollen hands and fever, you can use ice packs on the affected area; if it is a chronic inflammation, it is necessary to use hot compresses, massage methods to accelerate blood circulation in the hands, and regularly do some appropriate stretching exercises. External Xu medication or localized closure can be used to relieve early tendinitis. If recurrent attacks, surgical treatment is needed.