Tendon generally refers to tendons, ligaments and other soft tissues, tendon pain may be related to tenosynovitis, fasciitis, trauma and other reasons. 1. Tenosynovitis: It is caused by frequent extension and flexion activities of the joints, such as frequent use of cell phones, etc. When the tendons in the tendon sheaths of frequent activities, it will cause aseptic inflammation of the tendons and tendon sheaths, and tendon pain occurs. 2. Fasciitis: Fascia is a thin membrane wrapped around the muscle surface, which has the function of reducing the friction between tissues and organs. When the fascia is subjected to acute injury or chronic strain, such as beyond the capacity of the fascia, there will be tearing, bleeding, edema and other changes, which will also cause tendon pain. 3. Trauma: when trauma, if there are tendon or ligament strain, contusion or even rupture, it will also cause tendon pain, and in serious cases, it will even cause activity disorder. There are many causes of tendon pain, if the pain is serious or the activity is affected, you should go to the hospital in time for further examination and treatment.