Hidden pain at the root of the left thigh in men is common for the following reasons: first, ischemic necrosis of the femoral head, caused by the destruction of the blood supply to the femoral head, clinical manifestations of hip pain and release to the lower limbs, gait hobbling or limping, limited activity, examination found that the hip abduction, internal rotation, flexion is limited, compared with the healthy side is more obvious, treatment methods include low-frequency pulse magnetic therapy, the patient descending electromagnetic circle fixed in the Hip joint area, 6-8 hours of treatment every night, stepping method, daily stepping below the hip and both lower limbs, 20 minutes each time, 1-2 times a day, 30 days as a course of treatment, if conservative treatment is not effective, then need to be treated by surgery. Secondly, hip joint pigmentation choroidal nodular synovitis, manifested as hip joint pain intensifies when moving, difficulty going up and down stairs, joint cavity puncture examination fluid is dark red bloody or light red, treatment can choose arthroscopic hip joint total synovectomy, bone destruction feasible hip joint replacement, postoperative with radiotherapy to prevent recurrence.