Stenosing tendinitis of the radial styloid process is caused by frequent activities of the thumb or wrist, which causes the thumb extensor and thumb extensor tendons to rub against each other repeatedly in the tendon sheath of the radial styloid process for a long time, resulting in a sterile inflammatory reaction of the tendon and tendon sheath, local exudation, edema and fibrosis, thickening of the sheath wall, and local thickening of the tendon, causing clinical symptoms caused by obstruction of the tendon sliding in the tendon sheath. The clinical manifestations are mainly bulging and painful at the radial tuberosity, which can radiate pain to the forearm and thumb, and the pain is aggravated when moving the wrist and thumb, and cannot lift heavy objects. Sometimes hard nodules can be palpated. Movement of the wrist and thumb is slightly restricted. The disease is more common in middle-aged women than in men, about 6:1. It is more common in housewives and manual workers (such as weavers, carpenters and scribes). The onset of the disease is slow. The disease can be treated satisfactorily with non-surgical treatment. If the disease is recurrent or non-surgical treatment is ineffective, surgical incision of the narrow tendon sheath is feasible and effective. Early local closure is satisfactory. Local braking: Avoid hand activities, such as laundry and towel wringing. If necessary, plaster fixation for 2-4 weeks. Physiotherapy or hot compresses. Surgical treatment: If the non-surgical treatment is ineffective, surgery can be performed to cut the narrow tendon sheath and release the adhesions, but be careful not to injure the cephalic vein and the superficial branch of the radial nerve. Functional exercise should be performed early after surgery. The key to preventing this disease is to avoid overexertion of the wrist and thumb. In your normal life or work, pay attention to the combination of work and rest, and try to avoid prolonged activities of the wrist and thumb. Non-surgical methods of physical and pharmacological treatment can often relieve symptoms or cure. Very few stubborn cases require surgical treatment with good results.