Radial stenosis tenosynovitis is mainly characterized by limited pain in the radial styloid process. The disease starts slowly and worsens gradually, with pain at and around the thumb on the thumb side of the wrist (radial styloid process), obstruction of thumb movement, pressure and friction at the radial styloid process, and sometimes a slight elevated pea-sized nodule at the radial styloid process. If the thumb is held tightly within the other four fingers and the wrist is flexed to the medial (ulnar) side of the wrist, severe pain occurs at the radial styloid process. In the acute phase, there may be localized swelling. When the enlarged tendon passes through the narrow tendon sheath as a “tunnel”, the thumb will ring when it is flexed, which is also known as “ringing finger”. There is a strong ligament (extensor support band) attached to the concave surface of the radial styloid process, forming a sheath. There is a tendon of the long thumb extensor and short thumb extensor passing through it. The thumb occupies an important position in the function of the hand. A sudden increase in hand and wrist strain can damage the tendon and sheath and cause pain. The disease is associated with exertional injuries. A sudden increase in hand and wrist work can trigger the disease. Washing and knitting a lot of clothes at one time are common triggers. The middle-aged and elderly people should work appropriately and avoid sudden increase in the amount and intensity of work.