Pain in the tendon at the bend of the leg is considered to be related to traumatic injury, osteoarthritis, lumbar disc herniation, etc. According to the condition, general treatment, physical therapy, medication and surgical treatment can be used. 1. Traumatic injury: Traumatic injury, improper exercise or excessive activities can lead to strains or tears in the muscles or ligaments of the lower limbs, causing pain in the hamstring at the bend of the leg. After the injury, we should pay attention to the brake rest, the acute period of 72 hours the affected area should be cold compresses, 72 hours after the recovery period can be hot compresses, can be applied to non-steroidal anti-inflammatory analgesic drugs such as celecoxib and other pain relief. Generally about 1~2 weeks can be recovered. 2. Osteoarthritis: patients with osteoarthritis of the knee joint, in the activities or bending the leg due to the stimulation of the surrounding muscle ligaments, will cause pain in the tendons. Usually should pay attention to rest, avoid walking for a long time, can take non-steroidal anti-inflammatory drugs such as celecoxib and so on. You can also take non-steroidal anti-inflammatory drugs such as Celecoxib and so on. You can also cooperate with heat therapy, microwave and other physical therapy to relieve the symptoms. If the condition is serious, surgical treatment such as arthroplasty is feasible. 3. Lumbar disc herniation: When the protruding nucleus pulposus presses on the nerve root, it will cause pain in the buttocks, the back of the thigh, the calf, the foot, and the tendon at the bend of the leg. Non-steroidal anti-inflammatory drugs such as celecoxib can be applied. If the symptoms of nerve compression are severe, surgical treatment such as minimally invasive medullary nucleus pulposus removal can be performed if surgery is indicated. When there is a big tendon pain in the bend of the leg, you should go to the hospital in time to identify the cause of the disease, targeted treatment, the above drugs need to be applied under the guidance of the doctor.