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”. 1, radius fracture Radius fracture occurs mostly in the distal end, extremely common, accounting for about 1/10 of the usual fractures. mostly seen in older women, children and young people. The fracture occurs within 2 to 3 cm of the distal radius. It is often associated with damage to the radial carpal joint and the inferior ulnar radial joint. The radius, one of the two bones of the forearm, is divided into one and two ends. The upper end forms a flat round radial head with a concave radial head concavity above the head, which is associated with the humeral tuberosity. The circumference of the radial head has a circumferential articular surface, which is associated with the radial notch of the ulna. The neck of the radius is smoothly reduced below the radial head, and there is a large rough elevation below the neck called the radial ramus, which is the resistance of the biceps brachii. The medial margin is sharp, also known as the interosseous ridge, and is opposite to the interosseous ridge of the ulna. The rough surface at the midpoint of the lateral surface is the ramus of the pronator teres. The inferior end is particularly inflated and subrectangular. The distal side is smoothly concave and is the carpal articular surface, which is associated with the proximal carpal bone. The medial side has an ulnar notch and is associated with the ulnar head. The lateral side protrudes downward and is called the radial styloid process, which is about 1 to 1.5 cm lower than the ulnar styloid process. 2.Congenital ulnar radial joint This is a relatively common congenital deformity of the upper limbs, about 60% is bilateral. Since the mobile function of pediatric patients is not yet developed, and the reduced or absent rotational function of this disease is only limited to the forearm, patients often cannot be detected in time, so it is rare to see neonatal and infant cases. Patients are mostly found in early childhood at the age of 4 to 5 years due to the defect of movement, fixation of the anterior rotational position of the hand and disappearance of the posterior rotational activity before they are taken seriously and discovered. Fracture of radial tuberosity Fracture of radial tuberosity is mostly caused by the impact of violence on the lower end of the radius along the carpal navicular when the palm of the hand falls to the ground; or the fracture of radial tuberosity caused by the flipping handle of the hand cranking a car engine, so it is also known as cranking handle fracture. The fracture line is often transverse and affects the radial carpal joint, and the fracture block is mostly undisplaced. 4, distal radius epiphysis separation In human epiphysis injury, the distal radius is the most likely site, accounting for almost half of the whole body epiphysis injury, that is, 40% to 50%. 5.Radial trunk fracture The radial trunk fracture alone accounts for only 12% of the total number of forearm fractures, mostly in young adults.