The pain of the inner thigh tendon when walking can be caused by the following reasons: first, strain of the inner thigh muscles, when the inner thigh muscles are strained, there can be obvious pain when walking and moving, which can be accompanied by local bruising and swelling, which should be diagnosed by early physical examination, and after diagnosis, early rest and treatment with topical and oral medication. Second, hip impingement syndrome, when the hip joint has impingement syndrome, there can be pain in the inner thigh tendon, which is a radiating pain, then we should check the X-ray and MRI of the hip joint to diagnose and treat early. Third, femoral head necrosis, when there is obvious necrosis of the femoral head, there can be pain in the inner thigh when walking or bearing weight on the hip joint, then it is necessary to check the X-ray of the hip joint and MRI of the femoral head for diagnosis at an early stage.