There are many causes of lateral wrist pain, such as cold on the outside of the wrist, lateral wrist fasciitis, tenosynovitis, cervical spondylosis and so on. 1. Cold on the outside of the wrist: when the muscles, ligaments and other soft tissues on the outside of the wrist get cold, it will cause insufficient blood circulation in the muscles, muscle contraction or spasm, and then the activity will pull to the surrounding fascia and tissues, so as to produce inflammation and cause pain symptoms. 2. Lateral wrist fasciitis: Prolonged use of the wrist for strenuous exercise will lead to cumulative strain on the lateral wrist fascia, resulting in edema, hyperplasia and other aseptic inflammation of the fascia, which will cause pain in the lateral wrist tendon during activities. 3. Tenosynovitis: maintaining a wrist activity for a long time will lead to repeated friction between the tendons and tendon sheaths of the wrist, and severe friction will lead to tendon sheath damage. The tendon sheath will become edematous and proliferate, which will cause pain on the outside of the wrist. 4. Cervical spondylosis: long-term low head work, look at the phone, will lead to degenerative changes in the cervical spine, which will compress the surrounding nerve tissue, resulting in abnormal sensation on the outside of the wrist, lateral wrist tendon pain. If the phenomenon of tendon pain on the outside of the wrist, you should go to the hospital in time for a comprehensive examination to find out the specific causes of the disease, and early and reasonable treatment.