The left side of the hip joint pain is commonly caused by the following reasons: first, hip joint muscle strain, excessive hip joint activity and stretching can lead to hip joint muscle strain, manifested as local pain symptoms, obviously with hip joint activity limitation. Secondly, femoral greater trochanteric bursitis, femoral greater trochanteric bursa is located between the greater trochanter and gluteus maximus tendon, gluteus maximus tendon and the greater trochanter repeated friction, which can make the greater trochanteric bursa congestion, edema and exudation, resulting in local pain symptoms, this disease is more common in adult males, unilateral onset of the disease is common, the clinical manifestations are localized swelling, greater trochanter posterior depression is often disappeared, the outer side of the hip joint abnormally full, hip joint pain symptoms during the activities. The pain is obvious when the hip joint is moved, accompanied by limited pressure pain and friction sensation when moving.