The tendon pain is mainly related to soft tissue injury or infection caused by excessive activity, other diseases and other factors, as follows: 1, soft tissue strain: long-term excessive exercise or often heavy load, long distance walking, keep the same posture for a long time, will lead to excessive stretching of soft tissues, so that the tendon part of the fatigue injury and lead to pain; 2, trauma: trauma around the tendon, such as direct violence to this part The pain will be caused by direct violence to this area, or some strains and sprains. Commonly caused by strained ligaments during strenuous activities, when tiptoeing on the heel or tensing the calf, pain will occur in the greater tendon area; 3, infection: if infection occurs in the greater tendon area, inflammatory stimulation can cause local congestion and edema, thus causing pain; 4, cervical spondylosis: when compression of the nerve root will lead to radioactive pain in the area. In addition, the pain of the large tendon on the posterior side of the hip is related to the abnormal sciatic nerve. Spinal stenosis and herniated discs in the lumbar region can compress the sciatic nerve and cause pain, while the sciatic nerve is just on the posterior side of the hip, which is manifested as feeling large tendon pain. If the pain is in the large tendon on the posterior side of the knee, it is often related to diseases such as chondromalacia patellae, osteophytes of the joint or popliteal cysts. Patients with such symptoms should seek medical attention as soon as possible to clarify the cause for targeted treatment.