Tendonitis is a disease that causes a lot of pain to patients, and tendonitis can also have a big impact on life, and many patients are unable to study or work properly. It is important that tendon sheathing be done early, as late tendon sheathing can be more difficult to treat and can have a greater impact. The next step is to take closed treatment measures, using steroid drugs for intrathecal injection, which is fast-acting and long-lasting. However, because there may be more than one interval inside the first extensor septum, sometimes the effect of closed injection is incomplete. In diabetic patients, closed therapy is less effective. There are more ways of treatment, and it is recommended that if necessary, surgery can also be done by means of surgery, which can have a very good control effect, but it is necessary to undergo examination before surgery, closure therapy and conservative treatment is not effective, and patients with severe symptoms. It is recommended that surgery be performed under local anesthesia, mainly at 1cm proximal to the radial styloid process, with a transverse incision along the cortex, paying attention to protecting the superficial branch of the radial nerve, exposing the first extensor interval, and cutting the first extensor interval, paying attention to probing the interval chamber for separation, and if there is separation, it should be completely removed, and the abductor longus tendon and extensor shortus tendon should be completely released. The above are all about the treatment of tenosynovitis, it can be said that there are more ways to treat tenosynovitis, which specific treatment plan to take, what combination of drugs to take according to the examination to decide. The patient should maintain an optimistic and positive attitude towards the disease, and it is believed that the symptoms of tenosynovitis can be controlled with the help of a professional doctor. The patient should also be careful not to engage in stimulating sports or heavy physical activities during this time, which are not conducive to the recovery of tenosynovitis.