The tendon pain inside the right leg when pressing the outside of the leg is considered to be caused by nerves, bones, fascia, muscles, systemic diseases and other reasons. 1. Nerves: caused by sciatic nerve injury, sciatic neuritis, lumbar disc herniation and other compression of the nerve root and stimulation of the nerves, the patient will have leg pressure pain and radiating pain in the leg and other manifestations. 2. Bone: If the patient suffers from knee osteoarthritis, osteoporosis, osteoporosis, pelvic bone fracture, ankle fracture, etc., it will cause leg pressure pain and pain. 3. Fascia: If there is inflammation of the fascia fascia, it will lead to lumps or striated nodules on the soles and roots of the feet, which will cause pain inside when pressing on the outside of the right leg. 4. Muscle: it is due to muscle injury caused by sports strain, too strenuous sports, external impact, heavy objects, etc. If the muscle injury site is in the leg, it will cause leg muscle spasm, swelling, and pain when pressing and other symptoms. 5. Systemic diseases: including rheumatoid arthritis, systemic lupus erythematosus, etc., which can cause soreness in the foot, wrist, ankle, knee and other parts of the muscle groups, and symptoms such as muscle pain when pressing. The tendon pain inside the right leg when pressing the outside of the leg needs to be clarified by the corresponding examination, and then according to the doctor’s guidance for the cause of the treatment.