The formation of trigger finger is closely related to the repetitive flexion and extension activities of the fingers and wrists as well as local friction and compression. The mechanism of the formation of trigger finger is as follows: when the finger is repeatedly flexed and extended, the tendon will repeatedly rub within the tendon sheath, and the repeated rubbing will stimulate the tendon sheath and tendon to form edema, and after the edema, it will become thicker, and the thickening will in turn rub the tendon sheath more severely, thus causing friction and extrusion between the two, and in severe cases, it can even lead to no way to flex and extend freely, and only when surgical treatment or conservative treatment makes the inflammation subside, the Only when the inflammation is reduced by surgery or conservative treatment can the trigger finger condition gradually disappear.