Possible causes of lateral thigh tendon pain include muscle strain, ligament strain, hip joint inflammation and so on. Different causes can be treated accordingly, such as rest, physical therapy, medication and so on. 1. Muscle strain: due to prolonged long-distance walking, or overwork of the lower limbs leading to thigh muscle strain, which should rest, avoid overwork, and can be appropriate to the painful parts of the massage in order to alleviate the pain symptoms. 2. Ligament strain: due to strenuous exercise before not doing a good job of warming up, or due to the movement of the leg range of activity is too large resulting in thigh ligament strain, the first physical therapy, to appropriate braking, wearing protective gear if necessary, appropriate muscle exercise, severe pain can also take some oral non-steroidal anti-inflammatory drugs such as aspirin, ibuprofen, etc., to be ligament gradual self-recovery. 3. Inflammation of the hip joint: due to infectious inflammation of the hip joint or non-infectious inflammation such as rheumatoid arthritis, etc., which will cause pain in its parts, and will also radiate to the leg to cause pain in the lateral hamstring of the leg. The treatment is usually anti-inflammatory and analgesic using antibiotics corresponding to the infecting germs (e.g., cefadroxil) or taking some oral non-steroidal anti-inflammatory drugs such as aspirin and ibuprofen. There may be other causes and treatments for thigh side tendon pain, it is recommended to go to the hospital in time to identify the cause of the disease and give targeted treatment. The above drugs need to be used under the guidance of a doctor.