The outer thigh root and crotch joint generally refers to the hip joint, and hip pain can be caused by osteoarthritis of the hip joint, ischemic necrosis of the femoral head, femoral neck fracture and so on. According to the different reasons, you can take oral medicine for conservative treatment or choose surgery. 1. Osteoarthritis of the hip joint suggests patients to reduce activities, avoid strenuous exercise, and take oral medication under the guidance of the doctor to treat the symptoms. 2. Ischemic necrosis of the femoral head is recommended to be treated conservatively in the first and second stages, while in the third and fourth stages, it is recommended to go to the hospital for detailed assessment of the condition and to clarify the need for surgical treatment. 3. Patients with femoral neck fracture should be treated with internal fixation or artificial joint replacement according to specific conditions.