The more often you click your fingers, the more red envelopes you can grab. Over time, the more frequently you use your fingers, the more likely you are to develop what is known as tenosynovitis, or tendonitis (also known as trigger finger). Definition of tendon sheath First of all, let’s understand what is tendon sheath, tendon sheath is a double casing-like closed synovial tube outside the tendon, which is the synovial sheath that protects and fixes the tendon. The tendon sheath is the sheath of synovial fluid that protects and holds the tendon in place. When frequent finger movements cause excessive friction between the tendon and the tendon sheath for a long time, the tendon will slowly degenerate and the synovial sheath secretion function will gradually diminish, and the tendon sheath will slowly become inflamed or even swollen, becoming tenosynovitis. Tenosynovitis is generally referred to by various names depending on the location of the tendon sheath, and occurs in the thumb near the back of the wrist. The thumb, middle finger or ring finger is called flexor tendon stenosis tenosynovitis, the initial stage of the disease when the finger flexion and extension produce popping, pain, serious when the joint can not be flexed or straightened, so also known as “trigger finger”, after a long time to play the game occurred in the thumb pain and inflexibility is typical of flexor tendon stenosis tenosynovitis. The main damage is to the long flexor tendon of the thumb, and the pain and pathogenic points are mainly concentrated in the lower part of the distal end of the metacarpal finger of the thumb. Treatment Early tui-na treatment has good results. The starting point of the long flexor thumb is found in front of the middle 1/3 of the radius and on the interosseous membrane, and then the muscle stop is found by extending the radius to the distal phalanx of the thumb. The first step is to gently flick or press the starting point of the thumb flexor with the fingers, the range can be larger, all the way to the distal end of the thumb, repeatedly 3 to 5 times; the second step is to use the push method to extend the direction of the muscle fibers with the palm of the hand from the top to the bottom and gently push straight 3 to 5 times until the skin feels warm; the third step is to stretch the affected thumb backward, using the palm of the healthy hand to align with the straightened thumb of the affected hand to slowly pull the thumb in the direction of the elbow The third step is to stretch the affected thumb backward, using the palm of the affected hand against the straightened thumb and slowly pulling in the direction of the elbow. In severe cases, closed injection or needle knife can be used to loosen the effect.