Greater trochanter percussion pain is a clinical symptom of traumatic femoral head necrosis. So, what are the symptoms of greater trochanteric kyphosis? How to make a preliminary diagnosis of greater trochanteric pain? Below, several diagnostic methods are introduced: 1. Clinical manifestations: mostly seen in young adults, after femoral neck fracture, 1. 5 months to 10 years after the reappearance of hip pain. The pain appears 85% of the time within 3 years after the injury, 98% within 5 years. Some patients have persistent joint pain for half a year or even more than a year after femoral neck fracture, in which case they should be highly alert to the occurrence of ischemic necrosis of the femoral head. The pain is located at the root of the thigh and hip, and some patients have radiating pain at the knee, and weight bearing on the affected limb will aggravate the pain. Due to the joint braking after femoral neck fracture, the range of motion of the hip joint is severely restricted, which is much more obvious than that of non-traumatic patients. 2.Signs: Patients after internal fixation can find surgical scar of the affected hip, soft tissue adhesions, atrophy and stiffness. The quadriceps muscle atrophy, inguinal region pressure pain, greater trochanter percussion pain, heel axial percussion pain positive. In cases with femoral neck fractures, the signs are more pronounced, and the movement of the affected hip is severely restricted, the longer the history, the more pronounced the restriction. The patient has a limping gait. The affected limb is afraid to bear weight for a long time. If the femoral head collapse is serious, there may be shortening deformity of the affected limb. 3.Special examination: rhomas sign and 4-character test are positive. If the femoral head collapse is severe, AHis sign and single-leg independence test (trendelenburg) sign are positive. Ober’s sign is positive if there is contracture of the broad fascial tensor or iliotibial bundle. If the hip joint is severely collapsed or semi-dislocated, the iliac sitting line (Nelaton line) is displaced upward, the iliac turning line (Shoemaker line) intersects with the median line under the umbilicus, Bryant, the bottom edge of the triangle is less than 5 cm, and the Shenton line is discontinuous. 4, auxiliary examination: X-ray film in the post-injury detection of ischemic necrosis of the femoral head time, the early is 1. 5 months, the latest can be up to 17 years after the injury, early diagnosis of ischemic necrosis of the femoral head has three X-ray indications: the appearance of nail marks, femoral head height decreases and sclerotic hyaline zone.