1. What is tenosynovitis? Tendon sheath is a double-layer sleeve-like closed sliding membrane tube covering the tendon, which is the synovial sheath that protects the tendon. It is wrapped around the tendon in two layers, and a cavity between the two layers is synovial cavity, which contains synovial fluid of tendon sheath. The inner layer is close to the tendon, and the outer layer is lined in the tendon fiber sheath, which is combined with the bone surface to fix, protect and lubricate the tendon from friction or oppression. Tendon sheath has the function of maintaining normal flexion and extension of fingers and tendon sliding. When the hand is fixed in a certain position and repeatedly moves excessively, friction often occurs between tendon and tendon sheath, resulting in edema and fibrosis, causing lumen stenosis. Because the tendon moves in the tendon sheath, its path is narrow, which leads to pain and dyskinesia. This is tenosynovitis, also known as stenosing tenosynovitis. Second, classification of tenosynovitis (1) Stenosing tenosynovitis of radial styloid process starts slowly and gets worse gradually, which is characterized by pain at the bony process (radial styloid process) on the thumb side and around the wrist, obstruction of thumb movement, tenderness and friction at the radial styloid process, and sometimes a pea-sized nodule is slightly raised at the radial styloid process. If you hold your thumb tightly with the other four fingers and bend your wrist to the inside of your wrist (ulnar side), severe pain will occur at the styloid process of the radius. There may be swelling locally in the acute stage. When the swollen tendon passes through the narrow tendon sheath, the thumb will make a noise when it flexes, which is also called "snapping fingers". (2) Tenosynovitis of flexor tendon mostly occurs in thumb and middle finger. Finger flexion and extension dysfunction is particularly obvious when you wake up in the morning, and it can be alleviated or disappeared after the activity. Pain sometimes radiates to the wrist. The flexion of metacarpophalangeal joints may be tender, and sometimes thickened tendon sheaths and pea-sized nodules may be touched. When bending the affected finger, it suddenly stays in the semi-bending position, and the finger can neither be straightened nor bent, which is as unbearable as being suddenly "stuck". After being pulled with the other hand, the finger can move again, producing a trigger-like action and snapping sound, so it is also called "trigger finger".

Third, the treatment of tenosynovitis Treatment of tenosynovitis: Hyperthermia, massage, and full rest for about 3 weeks can be performed on the affected area, especially to reduce physical labor that causes diseases. Local blocking therapy once a week can relieve early tenosynovitis. When the above treatment fails or recurs, tendon sheath incision should be done and finger flexion and extension exercise should be done early after operation to prevent tendon adhesion. Free from physical labor within one month after operation. Fourth, the daily care and exercise methods of tenosynovitis

1. Wash your hands with warm water

Get into the habit of washing your hands with warm water after work, instead of cold water, exercise your hands in time and massage yourself. If you have this disease, it is important to treat it as early as possible so as not to delay it into a chronic disease.

Step 2 turn your wrist

When the tingling begins, you can do some gentle hand movements to relieve the pain. Turning the wrist is one of the simple exercises. Turn your wrist for about 2 minutes. It can exercise all muscles of the wrist, restore blood circulation, and eliminate wrist bending posture that often causes wrist pain and other symptoms.

3. Raise your arm

Raise your hand above your head and turn your wrist while turning your arm. This helps your shoulders, neck and upper back to adjust their positions and relieve stress and tension.

4. Turn your head.

Take a break at work, put your hands on the table and rotate your head for 2 minutes. Bend your neck forward and backward, point your head at your shoulders, twist your neck, and look at your left and right shoulders.

5. Exercise regularly

It is important to exercise and relax all sore muscles every day, even if you don't feel pain. The local exercises mentioned above should be practiced at least 4 times a day.

6. Raise your hand.

When resting, avoid putting your hands under your shoulders. Support your elbow with a desktop, or lean your elbow against the handle of the chair. Hands up. This is a good rest posture.

7. Fist-making practice

Hold your fist gently, then open and straighten your fingers. Repeated practice like this helps to relieve the sting.

8. Avoid drooping arms.

When sleeping, keep your arms close to your body and your wrists not bent. If you let your hands hang over the bed, it will increase the pressure on your hands.

9. Use tools carefully

When using tools, don't concentrate pressure on the root of your wrist. Try to use elbows and shoulders.