The cause of the tendon pain behind the knee must be clearly identified before the treatment can be applied, such as hot compresses, physiotherapy and surgery, etc., as follows: 1, hot compresses, physiotherapy: tendon pain behind the knee is usually seen in hamstring strain, in this case you can use local hot compresses, physiotherapy to improve muscle blood circulation, while avoiding sports for two weeks, generally local muscle strain can be relieved by itself. . 2, surgical treatment: If the pain behind the knee is caused by popliteal cysts, you can consider surgical treatment, such as arthroscopic popliteal cyst removal, which can completely prevent the recurrence of popliteal cysts. If the pain is caused by a tear in the posterior horn of the knee meniscus, arthroscopic meniscus suture surgery can be considered. If there are no conditions for suturing, meniscoplasty can be performed, which can eliminate the pain and relieve the symptoms.