Severe tendovaginitis can lead to the following consequences, i.e., the patient may exhibit a trigger-like movement and popping sound as the tendon bulges nodes force their way through the narrow tendon sheath during finger flexion, which is clinically known as interlocking symptoms. Stenosing tenosynovitis is caused by repetitive wear and tear of the tendon and tendon sheath, and has a slow onset and increasing severity. In the early stage, it is limited to stiffness and pain in the fingers and toes in the morning, while in the late stage, the tendon becomes enlarged in the shape of a gourd, and when the tendon slides, it cannot pass through the narrow tendon sheath normally, and the finger stays in the straightened or flexed position, thus producing severe limitation of movement, and the patient cannot move normally, affecting normal life and work. Therefore, in severe cases of tendinitis, surgery is usually considered to cut the narrow tendon sheath to relieve the inflammation of the narrow tendon sheath and to restore the tendon movement.